Genetics

Front

What is the genotype for an individual with a purple phenotype if green is dominant?

Back

gg

Front

What type of parents are involved in a Punnett square that shows a cross between two homozygous parents?

Back

Two homozygous parents

Front

What does it mean to be homozygous?

Back

Having two of the same alleles for a trait (sometimes called pure).

Front

If one dog is homozygous long-haired (LL) and its mate is homozygous short-haired (ll), what is the probability of their offspring having long hair?

Back

100%.

Front

What are the phenotype percentages of the offspring from a cross of A-Brown fur (A) and a-white fur (a)?

Back

75% Brown fur and 25% White fur.

Front

What is the definition of a dominant allele?

Back

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

Front

What is a recessive allele?

Back

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

Front

What is a Punnett square used for?

Back

To predict the genotypes and phenotypes of offspring from genetic crosses.

Front

What does heterozygous mean?

Back

Having two different alleles for a trait.

Front

What is the difference between genotype and phenotype?

Back

Genotype refers to the genetic makeup, while phenotype refers to the observable traits.