Wednesday-Punnett Square

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 homozygous mean?

Back

Homozygous refers to having two identical alleles for a particular gene, such as AA or aa.

Front

What does heterozygous mean?

Back

Heterozygous refers to having two different alleles for a particular gene, such as Aa.

Front

What is the difference between dominant and recessive alleles?

Back

A dominant allele is expressed in the phenotype even when only one copy is present, while a recessive allele is only expressed when two copies are present.

Front

What is the genotype for a homozygous dominant individual?

Back

The genotype for a homozygous dominant individual is represented as AA or BB.

Front

What is the genotype for a homozygous recessive individual?

Back

The genotype for a homozygous recessive individual is represented as aa or bb.

Front

What is the probability of offspring having a recessive trait if one parent is heterozygous and the other is homozygous recessive?

Back

The probability is 50%.

Front

What does the term 'allele' mean?

Back

An allele is a variant form of a gene that can produce different traits.

Front

What is the significance of the letter used to represent alleles in genetics?

Back

Uppercase letters represent dominant alleles, while lowercase letters represent recessive alleles.

Front

How do you determine the phenotype from a genotype?

Back

The phenotype is determined by the expression of the alleles in the genotype, where dominant alleles mask the effect of recessive alleles.