Problem 1
A heterozygous individual has a ____ for a trait being studied. a. pair of identical alleles b. pair of nonidentical alleles c. haploid condition, in genetic terms
Problem 2
An organism's observable traits constitute its _____. a. phenotype c. genotype b. variation d. pedigree
Problem 3
In genetics, \(\mathrm{F}\) stands for filial, which means _____. a. friendly c. final b. offspring d. hairlike
Problem 4
The second-generation offspring of a cross between individuals who are homozygous for different alleles of a gene are called the _____. a. \(\mathrm{F}_{1}\) generation c. hybrid generation b. \(\mathrm{F}_{2}\) generation d. none of the above
Problem 5
\(\mathrm{F}_{1}\) offspring of the cross \(A A \times a a\) are \(\mathrm{F}_{1}\) offspring of the cross \(A A \times a a\) are a. all \(A A\) c. all \(A a\) b. all \(a a\) d. \(1 / 2 A A\) and \(1 / 2\) aa a. all \(A A\) c. all \(A a\) b. all \(a a\) d. \(1 / 2 A A\) and \(1 / 2\) aa
Problem 7
A testcross is a way to determine _____. a. phenotype b. genotype c. both a and b
Problem 8
Assuming complete dominance, crosses between two dihybrid \(\mathrm{F}_{1}\) pea plants, which are offspring from a cross \(A A B B \times a a b b,\) result in \(F_{2}\) phenotype ratios of _____. a. 1: 2: 1 b. 3: 1 c. 1: 1: 1: 1 d. 9: 3: 3: 1
Problem 9
The probability of a crossover occurring between two genes on the same chromosome _____. a. is unrelated to the distance between them b. decreases with the distance between them c. increases with the distance between them
Problem 10
A gene that affects three traits is _____. a. epistatic c. pleiotropic b. a multiple allele system d. dominant
Problem 11
The phenotype of individuals heterozygous for _____ alleles comprises both homozygous phenotypes. a. epistatic c. pleiotropic b. codominant d. hybrid
