Exam 8: Inheritance, Genes, and Chromosomes

Use the following to answer questions : In a species of tortoise,foot size (big or small)is controlled by one gene,while shell shape (round or lumpy)is controlled by another gene.Suppose that a big-footed lumpy-shelled tortoise mates with a small-footed round-shelled tortoise.Eight offspring result: four big-footed round-shelled tortoises and four small-footed round-shelled tortoises.(Assume that the parents are not necessarily homozygous for each allele. ) -Which statement about the inheritance of footedness in tortoises is most likely to be correct,given your genetic analysis of the tortoise family?

If Mendel's crosses between pea plants with round yellow seeds and pea plants with wrinkled green seeds had produced an F₂ generation in which many more than one-sixteenth of the plants had wrinkled green seeds,the conclusion would have been that

Use the following to answer questions : Egg and Fluffy are two linked bird genes that are 16 map units apart.The E allele of Egg produces large eggs and the e allele produces small eggs (E is dominant).The F allele produces fluffy feathers and the f allele produces nonfluffy feathers (F is dominant). -If EeFf is crossed with eeff,what proportion of female offspring will produce small eggs and fluffy feathers?

Mendel's crossing of round-seeded pea plants with wrinkled-seeded pea plants resulted in progeny that all had round seeds.This indicates that the wrinkled-seed trait is

Mendel performed a cross between individuals heterozygous for three different traits: green versus yellow seeds (green is dominant),red versus white flowers (red is dominant),and green versus yellow pods (green is dominant).What fraction of the offspring would have been expected to have green seeds,red flowers,and green pods?

Use the following to answer questions : Suppose members of a true-breeding strain of salamanders with yellow stripes are crossed with a true-breeding strain with red stripes.Red and yellow are two alleles of the same gene.The resulting offspring have both yellow stripes and red stripes. -Which dominance pattern is most consistent with the observations?

One of the major contributions of Mendel to the study of genetics was

In a species of wild lupine flower,the smooth seed allele (S)is completely dominant over the wrinkled seed allele (s).If the alleles for height are incompletely dominant,such that TT is tall,Tt is intermediate,and tt is short,what will result from crossing a smooth-seeded short (SStt)plant with a wrinkled-seeded tall (ssTT)plant?

Use the following to answer questions : Cleft chin is an X-linked dominant trait.Assume that a man with a cleft chin marries a woman with a round chin. -What percent of their male progeny will show the cleft chin trait?

A dominant allele (K)is necessary for normal hearing;kk individuals are deaf.A dominant allele (M)on a different locus results in deafness no matter which other alleles are present.If a kkMm individual is crossed with a Kkmm individual,_______ percent of the offspring will be deaf.

Which statement about plasmids is false?

A number of characteristics of the common garden pea made it suitable for Mendel's breeding experiments.Which of the following is not one of those characteristics?

If Mendel had performed experiments on cattle rather than on peas,the patterns of inheritance would not have been easily detectable,because cattle

Separation of the alleles of a single gene into different gametes is called

At a certain locus of the human genome,200 different alleles exist in the population.Each person has at most _______ allele(s).

Very few genes have been located on the Y chromosomes of humans.Y-linked genes include a gene called testis-specific protein Y.A male with this gene will

Genetic mutations are not

Which method was not used by Mendel in his study of the genetics of the garden pea?

The particular allele of a gene that is present in most individuals in nature is referred to as

Morgan demonstrated that white eye color in Drosophila is carried recessively on the X chromosome (recall that females are XX and males are XY).Which of the following best describes the offspring of a heterozygous (carrier)female and a white-eyed male?