Genetics Flashcard 2

Front

What is the percent chance of each possible phenotype of the offspring when crossing a heterozygous (Aa) with a homozygous recessive (aa)?

Back

75% can wink (A) and 25% can't wink (a)

Front

What are the possible genotypes for the offspring when a heterozygous tall pea plant (Tt) is crossed with a short pea plant (tt)?

Back

Tt and tt

Front

If two brown-eyed parents (Bb) have a baby, what is the chance the baby is blue-eyed?

Back

25%

Front

What is a recessive allele?

Back

A trait that requires two of that allele to be seen.

Front

What is the definition of phenotype?

Back

What you see, or the physical appearance of a trait.

Front

What is a genotype?

Back

The genetic makeup of an organism, represented by alleles.

Front

What does homozygous mean?

Back

Having two identical alleles for a trait.

Front

What does heterozygous mean?

Back

Having two different alleles for a trait.

Front

What is the law of segregation?

Back

The principle that during the formation of gametes, the two alleles for a trait separate.

Front

What is a dominant allele?

Back

A trait that is expressed with only one allele of that type.