The pedigree at right shows the expression of a dominant mutation. What is the probability that the child of II-3 and II-4 will express this trait? I II Select one: a. 1/4 b. 0 O c. 1 d. 3/4 e. 1/2 12 3 456

This chart shows different patterns of inheritance in four pedigrees. Assume that individuals marrying into the family are homozygous for the wild-type allele. Which pedigree shows an autosomal dominant pattern of inheritance? a. III b. IV c. II d. I

What is the most likely order of the linked genes R, S, and T if the distance between R and S is 22 cM, the distance between S and T is 8cM, and the distance between R and T is 14 cM?   A. R S T       B. T R S       C. Cannot be determined     D. S T R

If a two-point testcross of heterozygous females and homozygous-recessive males in Drosophila results in a calculated map distance of 10 cM between the two genes, the offspring of the cross must have shown four phenotypes in a ratio of a. 9:3:3:1 b. 1:1:1:1 c. 19:19:1:1 d. 3:3:1:1 e. 9:9:1:1

An individual with two different alleles at a locus is a(n) Group of answer choices A. clone B. hemizygote C. homozygote D.heterozygote

If an allele for round seed coats (R) is dominant to an allele for wrinkled (r), what proportion of the progeny will be round in the following cross: Rr x RR? a. 0/4 b. 1/4 c. 2/4 d. 3/4 e. 4/4

What is the likely mode of inheritance in the below pedigree?   Select one: a. Dominant b. Recessive c. There is not enough information to determine dominant or recessive modes of inheritance.

You have a pure breeding line of tall corn and a purebreeding line of short corn.  When you cross them what do you expect the phenotype of the F1 to be? Group of answer choices A. impossible to tell with the information given B. all medium height C. 3/4 tall and 1/4 short D. all short E. all tall

Match the individuals in the following pedigree to genotypes C G ◆ Mode of inheritance A B с D E F G H A H D B E F A. Aa B. aa C. Recessive D. Dominant E. AA F. A- |