Question

21 multiple choice. 2 points one form of a gene, for example blue color and brown color of eyes, is called a(n)_______. allele protein gamete trait 22 multiple choice 2 points if a black mouse and white mouse are mated and the result is all gray offspring, what inheritance pattern would you assume controls hair color in mice? incomplete dominance multiple alleles codominance dominant - recessive 23 matching 2 points match the genotype to its correct description. bb bb bb homozygous dominant homozygous recessive heterozygous

Explanation:

• For question 21: An allele is one of the alternative forms of a gene. For example, the genes for eye - color have alleles for blue and brown eyes.
• For question 22: In incomplete dominance, the heterozygous phenotype is an intermediate between the two homozygous phenotypes. When a black and a white mouse mate and produce gray offspring, it shows incomplete dominance as gray is an intermediate color.
• For question 23: In genetics, 'bb' represents a homozygous recessive genotype (both alleles are recessive), 'BB' represents a homozygous dominant genotype (both alleles are dominant), and 'Bb' represents a heterozygous genotype (one dominant and one recessive allele).

Answer:

1. A. allele
2. A. incomplete dominance

23.
bb: homozygous recessive
BB: homozygous dominant
Bb: heterozygous