Genetics

Front

What is a carrier in genetics?

Back

A carrier is an individual who has one copy of a recessive allele that causes a genetic disease in individuals who are homozygous for that allele.

Front

What is the genotype for blood type B?

Back

The genotypes for blood type B are I^BI^B and I^Bi.

Front

What does the genotype 'aa' represent?

Back

The genotype 'aa' represents a recessive trait.

Front

What is the expected percentage of female offspring that will be carriers for a recessive disease if one parent is a carrier and the other is affected?

Back

50%.

Front

How many children did the parents from the first generation have?

Back

4.

Front

What is the percentage of offspring that can inherit blood type O if both parents are type A and type B?

Back

0%.

Front

What is the principle of segregation in genetics?

Back

The principle of segregation states that during the formation of gametes, the two alleles for a trait separate from each other.

Front

What is a dominant allele?

Back

A dominant allele is an allele that expresses its trait even when only one copy is present.

Front

What is a recessive allele?

Back

A recessive allele is an allele that only expresses its trait when two copies are present.

Front

What is a Punnett square?

Back

A Punnett square is a diagram used to predict the outcome of a genetic cross by showing the possible combinations of alleles.