A woman who can roll her tongue (presumably dominant) is married to a man who cannot roll his tongue. Two of their four children can roll their tongues and two cannot. If A= roll tongue and a= cannot roll tongue, then what is the genotype of the parents?

What would be the genotypic ratio of the following monohybrid cross: Aa x Aa?

The lagging strand of DNA in replication has more steps to complete than in the leading strand.

If the genotype of an organism is heterozygous (Aa) for a trait, what kinds of gametes could this organism produce?

Normally a child with a dominant trait does NOT have a parent with the trait.

A recessive allele is expressed in the absence of its dominant allele.

If a person inherits two X chromosomes, this individual will be _____.

If a DNA sample were composed of 30% thymine, what would be the percentage of guanine?

Little pieces of DNA on the lagging strand are referred to as

Down Syndrome is caused by a nondisjunction during meiosis. What would the karyotype look like?