genetics exam 1 review

What statement describes the phenotype consistent with co-dominance?

The phenotype of the heterozygote includes the phenotypes of both homozygotes.

Human males with XY chromosomes are _____ and produce two different kinds of gametes, whereas females with XX chromosomes are _____ and produce only one kind.

heterogametic; homogametic

Freckles are caused by a dominant allele. A man has freckles, but one of his parents does not have freckles. What is the man's genotype?

heterozygous

A "mistake" is happening during meiosis I in the following figure. Assume the second meiotic division is normal. How many chromosomes would be expected in the four cellular products of this meiotic event?

Two cells would have three chromosomes, and two cells would have five chromosomes.

The centromere divides a chromosome into two sections or "arms." A chromosome is found to have two arms of equal lengths. Such a chromosome can be BEST described as

metacentric

Interactions among the human ABO blood group alleles involve _____ and _____.

codominance; complete dominance