Human secondary sex ratio varies based on ethnicity and socioeconomic status.

In Drosophila, sex is determined by a balance between the number of haploid sets of autosomes and the number of ________.

For a given locus/gene in a population with two alternative alleles, the allele frequencies are  p + q = 1.0.

For this variation of genetic background, many many genes add up to give the final phenotype.

Two or more forms of a gene that occur at the same locus on homologous chromosomes are called _____________________. 

Lethal dominant alleles are more common than lethal recessive alleles.

The Protenor mode of sex determination is the ________.

Radishes may be long (S1S1), round (S2S2), or oval (S1S2).  If long radishes are crossed with round radishes and the F1 are allowed to cross with each other, the expected F2 phenotypic ratio will be ___.

Assume that a cross is made between AaBb and aabb plants and the offspring occur in the  following numbers:  106 AaBb,  48 Aabb,   52 aaBb,  94 aabb.  These results are consistent with which of the following?

Each sperm cell of a horse contains 32 chromosomes. How many chromosomes are in each of the horse’s somatic (body) cells?