AP Bio Genetics Practice Flashcard

Front

What is the expected phenotype of F1 offspring when a true-breeding orange flowered plant (YY) with oval pollen (OO) is crossed with a true-breeding white flowered plant (yy) with round pollen (oo)?

Back

Yellow flowers (Yy) and oval pollen (Oo).

Front

What does the term 'hybrid' refer to in genetics?

Back

A hybrid refers to a heterozygous genotype, which has two different alleles for a trait.

Front

If two carriers for a recessive condition have 4 children, what is the probability that all four will have the condition?

Back

1/256.

Front

What are the genotypes of two heterozygous pea plants for flower color (Pp) and seed color (Yy) when crossed?

Back

PpYy x PpYy.

Front

What is the genotype of a father with polydactyl (dominant trait) if the mother is normal and they have one normal child?

Back

Ee (heterozygous).

Front

Define homozygous in the context of genetics.

Back

Homozygous refers to having two identical alleles for a particular gene.

Front

Define heterozygous in the context of genetics.

Back

Heterozygous refers to having two different alleles for a particular gene.

Front

What is the principle of independent assortment in genetics?

Back

The principle that alleles for different traits are distributed to gametes independently of one another.

Front

What is a dominant trait?

Back

A dominant trait is one that is expressed in the phenotype even when only one copy of the allele is present.

Front

What is a recessive trait?

Back

A recessive trait is one that is expressed in the phenotype only when two copies of the allele are present.