Mendel's Laws

Recessive alleles seem to vanish in some generations and reappear in later generations because:  a. They cannot be expressed in males b. They are masked by a dominant allele c. They cannot be expressed in females d. They cannot be expressed in successive generations e. They are lost by mutation

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

If a pea plant is heterozygous for yellow seeds (Yy), which gametes could it produce?  a. Y b. Y or y c. y d. Yy e. YYyy

If a pea plant is homozygous for yellow seeds (YY), which gametes could it produce?  a. Y b. Y or y c. y d. Yy e. YYyy

Which gametes can a RrYy plant produce?  a. Rr or Yy b. RY or ry c. RrYy d. RY, Ry, rY, or ry e. R or r

Which gametes can a RRyy plant produce?  a. RR or yy b. Ry c. RY or ry d. RRyy e. R or y

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

After the cell below is finished dividing, what will be a possible genotype for one of the daughter cells?a. rTdMb. RrTtDdMmc. RTDMd. RTdme. RrTTDdMm

Which of the following phenomena is a consequence of Independent Assortment?a. For any gene displaying complete dominance, heterozygous individuals exhibit the dominant phenotype.b. Pure breeding plants, when mated with each other, produce completely homozygous offspring.c. The phenotypic ratio among phenotypes produced from an F1 X F1 dihybrid cross is 9:3:3:1.d. Smooth seed trait is dominant to wrinkled seed trait in peas.

Independent assortment explains _______.a. why meiosis in a cell of genotype AaBb cannot yield Ab gametesb. why a collection of meiotic products that includes gametes of genotype Ab will also include gametes of genotype AB in roughly the same proportionc. why meiosis in a cell of genotype Aa yields A gametes and a gametes, but no Aa gametesd. why meiosis in a cell of genotype Aa yields A gametes and a gametes in roughly equal numbers