Extensions to Mendel

Cat fur color is affected by two genes. The B gene codes for fur color. The dominant allele (B) produces black fur (phenotype) and the recessive allele (b’) produces a cinnamon phenotype (when homozygous). The second gene (D) codes for the density of brown or black pigment. The dominant allele (D) allows for full deposition of the black pigments and the recessive allele (d) allows for lesser deposition of pigment (when homozygous), as coded for by the B or b gene. Black cats appear blue with less dense deposition and cinnamon cats appear fawn. If a black cat (Bb’Dd) is crossed with a blue cat (Bb’dd).What ratio of cats are expected to be cinnamon? a. 1 of 8b. 2 of 8c. 3 of 8d. 4 of 8

Cat fur color is affected by two genes. The B gene codes for fur color. The dominant allele (B) produces black fur (phenotype) and the recessive allele (b’) produces a cinnamon phenotype (when homozygous). The second gene (D) codes for the density of brown or black pigment. The dominant allele (D) allows for full deposition of the black pigments and the recessive allele (d) allows for lesser deposition of pigment (when homozygous), as coded for by the B or b gene. Black cats appear blue with less dense deposition and cinnamon cats appear fawn. If a black cat (Bb’Dd) is crossed with a blue cat (Bb’dd).For the description above, the D gene is said to be ________ relative to the B gene.a) dominantb) recessivec) codominantd) epistatic

Which the following Is an example of epistasis?a. A chicken with a dominant allele at the R gene has a rose comb, and a chicken with a dominant alleles at the P gene has a pea comb. However, a chicken with dominant alleles at both R and P genes has a walnut combb. A person with two copies of the lA allele at the ABO gene has blood type A. and a person with two copies of the lB allele at the ABO gene has blood type B However, a person with the genotype lAIB has the blood type ABc. A cat with two dominant alleles at the H gene has short hair, and a cat with two recessive alleles at the H gene has long hair However, a cat with a dominant allele and a recessive allele at the H gene has short haird. A fly with a dominant allele at the S gene has short body hairs and a fly with a dominant Q allele at the W gene has white eyes However a fly with dominant alleles at both the S gene and the W gene has short body hairs and white eyes

In the ABO blood type system the alleles  IA, IB and i produce:  a. Three phenotypes b. Two phenotypes c. One phenotype d. Four phenotypes e. Type A and type B blood types only

In the ABO blood type system the IA allele is _____ with the IB allele.  a. Dominant b. Co-dominant c. Recessive d. Homologous e. Heterologous

If the heterozygous phenotype is intermediate between those of the two different homozygotes, this is called:  a. Codominance b. Independent assortment c. Epistasis d. Incomplete dominance e. Polygenic

Traits that depend on more than one gene are:  a. Polygenic b. Pleiotropic c. Codominant d. Recessive e. Incomplete dominant traits

In cattle, the gene for hornless (H) is dominant to the gene for horned (h), the gene for black (B) is dominant to that of red (b), and the gene for white face (or Hereford spotting) (S) is dominant to that for solid color (s). A cow with the genotype BbHhSs is inseminated by a bull of the genotype bbhhSs. What is the probability of the calf's being:i) a black, hornless cow with Hereford spottingii a red, horned bull with solid coloriii) a red, hornless bull with Hereford spotting

In humans, the ABO blood groups are controlled by three alleles (only two of which occur in any one individual): the alleles for A and B type blood are co-dominant toward each other, and both are dominant to the allele for O type blood.i) If a person with type AB blood marries someone with type O blood, what are the possible phenotypes of their offspring?In the following, determine the genotypes of the parents:ii) One parent has type A and the other has type B, but all four blood groups are represented in the children.iii) Both parents have type A, but 3/4 of the children are A and 1/4 are O.iv) One parent has type AB and the other has type B, but of the children 1/4 have type A, 1/4 have type AB, and 1/2have type B.

A woman with type A blood has parents who are both type AB and a husband who is a type B. What is the probability that their first child will be a son with type O blood?

In the organism under consideration, r* acts like r allele, except when homozygous (r*r*). From the information given below, work out the phenotypic and genotypic ratios for each of the crosses.Given: RR (red) x rr (white) → Rr (pink); andrr* x rr* → 3/4 white, 1/4 dead zygotes1. Rr x Rr2. Rr x rr3. Rr* x Rr*4. Rr* x rr*

If you cross two pea plants, one with green peas and the other with yellow peas. All of the offspring have yellow peas. You conclude: a. Green is dominant over yellowb. Yellow and green are co-dominantc. Yellow is incompletely dominant over greend. Yellow is dominant over greene. Color is random in pea plants

In rabbits, fur color is determined by a set of multiple alleles at one locus (gene) that have the following relationship:C+ (agouti) is dominant to all other allelesch (himalayan) is dominant to ca (albino)cu (chinchilla) shows incomplete dominance with regard to c h and ca such that the genotypes cuch and cuca result in grey phenotypesA) What breeding stock (parents) would you select if you wished all of the offspring to be chinchilla?B) In one of the matings of rabbits, the litter contained 4 grey bunnies, 2 albino bunnies, and 2 himalayan bunnies. What were the genotypes of the parents?C) In another mating, the litter contained 3 agouti bunnies and 3 grey bunnies. What were the genotypes of the parents of this litter?

A dominant gene, A, causes yellow color in rats. The dominant allele of another independent gene, R, produces black coat color. When the two dominant genes occur together (A-R-), they interact to produce grey coat color. Rats of the double recessive genotype are cream-colored. If a grey male and a yellow female are mated and produce approximately 3/8 yellow, 3/8 grey, 1/8 cream, and 1/8 black, what were the genotypes of the parents?

Your research in hematology has led you to the discovery of a new type of inherited anemia, which exists in two forms- - mild and severe . The information you have gathered on the familial patterns for the disease is summarized below. From these data determine a mechanism for the inheritance of these traits that is consistent with all of the information.

In domesticated cats, the following genetic patterns have been described as independently assorting. Normal ears (T) is dominant to tufted ears (t); curved whiskers (C) is dominant to straight whiskers (c); the presence of six toes (S) is dominant to five toes (s); and the gene for hair length is an X-linked codominant. The three phenotypes for hair length are long (XHXH), medium (XHXh), and short (XhXh); medium is the heterozygous condition. Sex determination in cats is the same as for humans (XX = female).Given two parent cats:Tt cc SS XHXh x Tt Cc Ss XHYi) How many different gametes could be formed in the female cat with respect to these four traits?ii) How many phenotypes are possible in the offspring from this mating?iii) What fraction of the offspring will have tufted ears, curved whiskers, six toes, and long hair?iv) In a litter of 10 kittens, six are male. How many of the males would be expected to have tufted ears, six toes, straight whiskers, and medium-length hair?

In an inherited form of high cholesterol, rr individuals have a blood cholesterol level greater than 500mg/dL, Rr individuals are near 300mg/dL, while normal (RR) cholesterol levels should be less than 200mg/dL. The R allele is ___ to the r allele.  a. Codominant b. Dominant c. Recessive d. Homozygous e. Incompletely dominant

A man with type A blood and a woman with type B blood have a child with type O blood. What are the genotypes of the man and woman?  a. IA i , and IB i b. Both are i i c. IA IA, and IB IB d. IA i, and i i e. i i, and IB i

Radish flowers may be red, purple, or white. A cross between a red-flowered plant and a white-flowered plant yields all-purple offspring. The part of the radish we eat may be oval or long, with long being the dominant characteristic.If true-breeding red long radishes are crossed with true breeding white oval radishes, the F1 will be expected to be which of the following?a. White and longb. Purple and ovalc. Red and ovald. Purple and longe. Red and long

Coat color in mice is controlled by many genes, four of which we will consider. The gene C permits pigment deposition in the fur, whereas cc causes albinism. The gene B causes black pigmentation, whereas bb results in brown fur. The gene A causes deposition of a narrow band of yellow pigment near the tips of individual hairs, a condition called "black agouti" in black animals and "cinnamon" in brown animals; the genotype aa causes no yellow banding of hairs. The genotype dd causes a dilution of fur color (unless the fur color is already albino); the gene D has no effect on coloration at all. All of these genes are located on different autosomes. You cross a female mouse with genotype CcBbaaDd to a male mouse with genotype CcbbAaDd. The cross produces 10,000 offspring.What color coat does the female parent have?What color coat does the male parent have?Complete the following table by indicating the number of mice with each different phenotype.Remember there is no such thing as partial mouse so round number properly to the nearest whole number. List the different genotypes of dilute cinnamon offspring that could be produced in the above cross.

A woman who has blood type A positive has a daughter who is type O positive and a son who is type B negative. Rh positive is a trait that shows simple dominance over Rh negative and is designated by the alleles R and r, respectively.Which of the following is a possible genotype for the son with respect to the A-B-O blood group? (IA= the "A" allele, as if the "I" had a superscript "A"; same for the "IB" allele)a. iib. IBic. IAIAd. IBIBe. IBIA

In the ABO blood type system, there are six possible genotypes, but only two possible phenotypes.  a. True b. False

A woman who has blood type A positive has a daughter who is type O positive and a son who is type B negative. Rh positive is a trait that shows simple dominance over Rh negative and is designated by the alleles R and r, respectively.Which of the following is a possible genotype for the mother? a. IAIB b. IAIAc. iid. IAie. IBIB

The environment only rarely affects gene expression.  a. True b. False

A woman who has blood type A positive has a daughter who is type O positive and a son who is type B negative. Rh positive is a trait that shows simple dominance over Rh negative and is designated by the alleles R and r, respectively.Which of the following is a possible phenotype for the father?a. O negativeb. A negativec. B positived. AB negative

A woman who has blood type A positive has a daughter who is type O positive and a son who is type B negative. Rh positive is a trait that shows simple dominance over Rh negative and is designated by the alleles R and r, respectively.Which of the following is the probable genotype for the mother with respect to BOTH the A-B-O blood group AND the Rh trait?a. IAiRRb. IAIARrc. IAirrd. IAiRre. IAIARR

The ABO blood group assorts independently of the Rhesus (Rh) blood group and the MN blood group. Two alleles, R, a dominant allele producing Rh+, and r, a recessive allele for Rh-, are found at the Rh locus, and codominant alleles M and N occur at the MN  locus. Each gene is autosomal.Part A. A child with blood types O, Rh-, and M is born to a woman who has blood types A, Rh-, and MN and a man who has blood types B, Rh+, and M. Determine the genotypes of each parent. What is the mother's blood type?Enter the alleles the following way: IA as I^A, IB as I^B. i as i. Use _ to indicate any allele is possible. List dominant alleles first then recessive alleles.If listing both dominant alleles for ABO blood group, list IA first and then IB. Separate the three genes by a space. For example: I^Ai R_MMThe mother is __________.Part B. What is the father's blood type? Enter the alleles the following way: IA as I^A, IB as I^B. i as i. Use _ to indicate any allele is possible. List dominant alleles first then recessive alleles.If listing both dominant alleles for ABO blood group, list IA first and then IB. Separate the three genes by a space. For example: I^Ai R_MMThe father is __________.

A woman with type AB blood marries a man with type A blood.  Their first child has blood type B.  What is the probability that their next child will have type o blood?a) ¼b) ½c) ¾d) 1e) 0

A man with B type blood marries a woman with B type blood. Four of their children have B type blood and one has O type blood. What would be the genotype of the parents? What is the chance that their next child could have AB type blood?

A man and a woman, both with group AB blood, marry. What different genotypes and phenotypes can be expected among their children? What percentage of their children could have A type blood. What blood type or types could not appear in their children?

A man with type AB blood and a type B woman have a son with type B blood.What is the mother’s blood genotype?a. I A I Bb. I B I Bc. I B id. iie. It cannot be determined for sure.

A man with type AB blood and a type B woman have a son with type B blood.If the couple’s next child has type A blood, what is the chance that their third child is a type B daughter?a. 1/4b. 1/8c. 1/2d. 3/8e. It cannot be determined for sure.