In fruit flies, yellow body is a sex linked recessive allele. The dominant allele is dark bodied. If a female with a yellow body mates with a male with a dark body, then what percent of the female offspring will be yellow? O O O O a) 0 b) 25 c) 50 d) 75 e) 100

If 50% of gametes produced by a double heterozygote are recombinant, then Group of answer choices d) either a or b could be true a) the two genes of interest are 50 map units apart e) either a or c could be true b) the two genes are on separate chromosomes c) the two genes both exhibit complete dominance

Sex determination in birds is different from that in humans. The sex chromosomes in birds are called Z and W, because males have two of the same chromosome (ZZ), whereas females have two different chromosomes (ZW). There is a Z-linked allele in some birds that causes the death of the embryo when the normal dominant allele is not present. What would be the sex ratio in the living offspring of a cross between a male heterozygous for the lethal allele and a normal female? A) What are the genotypes of the parents? Male____ Female____ B)  Which gametes would each form? Male____ Female____   C) Draw your Punnett square below and determine the sex ratios of living offspring.

Mendel's pea plants were a good choice for studying heredity, because: a) They have lots of easily observable traits that vary in an either-or manner. b) Their mating is uncontrollable. c) There are separate male and female plants. d) The plants are incapable of cross-pollination.

Imagine a test cross of an unknown individual that results in all 1000 offspring being homozygous recessive for the two traits in question. What is the genotype of the unknown?A) Homozygous dominant for both genes. B) Homozygous dominant for one gene and homozygous recessive for the other.C) Heterozygous for both genes.D) Heterozygous for one gene and homozygous recessive for the other.E) This scenario cannot exist.

Why are toy poodles and rotweilers (dog breeds) members of the same species? A) They can mechanically breed with one another B) Their chromosomes and genes align. All of these D) They can produce offspring that are able to produce offspring

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Which statement is false when considering alleles and genes?   a) A given gene can have many different possible alleles. b) Alleles are alternative forms or variants of genes. c) Individuals can be homozygous or heterozygous, and this refers to which alleles they have for a particular gene. d) An allele is the same thing as a gene.

What can explain the phenomenon where the same genotype might give rise to different phenotypes? A) pleiotropy B) penetrance and expressivity C) complete dominance D) codominance E) Incomplete dominance Explain each answer.

Two heterozygote individuals (each carrying a dominant allele and a recessive allele) are crossed. What percentage of offspring in the F1 generation will express the recessive phenotype? A) 50% B)75% C)25% D)0%