Extensions to Mendel

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

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 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

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

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

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

An individual has the genotype AaBb having inherited the A and b alleles from her mother and the a and B alleles from her father. The A and B loci are on different chromosomes. During metaphase I the chromosome with the A is on the upper side of the equator and the chromosome with the B is on the upper side of the equator. After anaphase the cell separates to form two daughter cells one containing cytoplasm from above the equator and one from below. What will be the genotypes of the eggs resulting from this meiosis?a) AB and ab b) Ab and aB c) Ab only d) aB onlye) impossible to tell

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

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

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

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

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

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.

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