From the list below, how does the Y chromosome in male humans determine “maleness”?  

Tight-curled hair is caused by a dominant gene in humans (thus an autosomal dominant mode of inheritance). If a heterozygous tight-curled hair person marries a person with straight hair, what % of their offspring would be expected to have straight hair?   

A gene that affects expression of another gene is called a recessive allele.   

With incomplete dominance, a likely genotypic ratio resulting from a monohybrid cross would be ___.   

The typical genotypic ratio of offspring of two heterozygotes for a given trait inheritied in an autosomal recessive manner is 1:2:1.   

Following DNA replication during the S phase of interphase, copies of chromosomes are called chromatids and are joined at ____.   

Match the terms at left to the respective definition (or description). 

A reciprocal cross is a simple method used to discover an unknown genotype if an organism is expressing the dominant phenotype.  

In a monohybrid cross, what is the genotypic ratio of the F2 generation?   

The following recombination frequencies were found. Determine the order of these genes on the chromosome.   A-B = 40 A-C = 8 C-D = 18 C-B = 32 A-D = 26