中国大学MOOC: A testcross can be used to determine whether an individual is homozygous or heterozygous.

FH homozygous are currently treated with( ). A: Replacement B: Diversion C: Inhibition D: Depletion

In pigs, eye color is controlled by a single gene with two alleles. A farmer crossed a homozygous green-eyed pig with a homozygous brown-eyed pig, producing blue-eyed offspring. If the blue-eyed pigs are then mated with each other, what would the percent of their offspring most likely have brown eyes? A: 0% B: 25% C: 50% D: 75%

An organism is said to be ( ) if it carries two identical alleles for a certain trait. A: heterozygous B: homologous C: homozygous D: monohybrid E: dihybrid

If an organism is said to be true breeding for a particular trait, this means that A: they are heterozygous for that trait. B: they are homozygous for that trait. C: they are incompletely dominant for that trait. D: they have two kinds of alleles for that trait.

What can be concluded from the diagram? A: Both the mother and father are homozygous for Normal hemoglobin. B: Both the mother and father are carriers for sickle-shaped hemoglobin. C: The offspring has Normal hemoglobin. D: Both A and

In poodles, black is dominant to white. A black poodle is crossed with a white poodle. In a litter of four, all of the puppies are black. What is the best conclusion?? The black poodle is probably heterozygous.|The black poodle is probably homozygous|The black poodle is definitely homozygous.|The black poodle is definitely heterozygous.