Ch4 Flashcard1 - Monohybrid Cross

Front

What is meant by the term homozygous?

Back

There are two of the same alleles.

Front

What is a monohybrid cross?

Back

A hybrid cross involving a single trait with two expressions.

Front

What is the probability of a homozygous recessive offspring from two heterozygous brown-eyed parents?

Back

25%.

Front

What is the probability that the offspring of a black heterozygous male rabbit and a white recessive female rabbit will be white?

Back

50%.

Front

What is the probability of having wrinkly-seed offspring when crossing two homozygous pea plants (one wrinkly, one smooth)?

Back

100%.

Front

Define dominant allele.

Back

An allele that expresses its trait even in the presence of a recessive allele.

Front

Define recessive allele.

Back

An allele that only expresses its trait when two copies are present.

Front

What is the genotype of a homozygous dominant individual?

Back

Two dominant alleles (e.g., AA).

Front

What is the genotype of a homozygous recessive individual?

Back

Two recessive alleles (e.g., aa).

Front

What is the genotype of a heterozygous individual?

Back

One dominant and one recessive allele (e.g., Aa).