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Human eggs have ____ sex chromosome(s).

Which of the following helps to separate sister chromatids?

How many copies of the gene for blood type is a normal human likely to have?

A person with only 1 copy of the sex chromosome (XO) is said to have what condition?  

How many alleles code for blood type in the human population?

Nondisjunction of chromosome 21 results in a person having 3 copies of that chromosome causing a condition known as ____________.

Identify the stage of cell division shown below.

All the offspring of a cross between a black-eyed monkey and an orange-eyed monkey have black eyes. This means that the allele for black eyes is __________ the allele for orange eyes.

Each of the following is a function of saliva except:

Which of the following genotypes is homozygous recessive for the gene B?