Punnett Squares

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 from the parents.

Front

What does it mean if an allele is dominant?

Back

A dominant allele is one that expresses its trait even when only one copy is present in the genotype.

Front

What does it mean if an allele is recessive?

Back

A recessive allele is one that only expresses its trait when two copies are present in the genotype.

Front

What is the genotype of a cat with folded ears that is heterozygous?

Back

The genotype is Ff, where F is the dominant allele for folded ears and f is the recessive allele.

Front

If two heterozygous cats (Ff) are crossed, what is the expected percentage of offspring with folded ears?

Back

75% of the offspring are expected to have folded ears.

Front

What phenotype does the genotype HH represent in guinea pigs?

Back

The phenotype is short hair.

Front

What phenotype does the genotype hh represent in guinea pigs?

Back

The phenotype is long hair.

Front

If both parents have straight ears, what percentage of their kittens will also have straight ears if they are homozygous?

Back

100% of the kittens will have straight ears.

Front

In a genetic cross, what does the term 'phenotype' refer to?

Back

Phenotype refers to the observable physical traits of an organism.

Front

In a genetic cross, what does the term 'genotype' refer to?

Back

Genotype refers to the genetic makeup of an organism, specifically the alleles it carries.