Heredity and Punnett Squares

Front

What is a genotype?

Back

A genotype is the genetic makeup of an organism, represented by the alleles it possesses.

Front

What is a phenotype?

Back

A phenotype is the observable physical or biochemical characteristics of an organism, determined by its genotype.

Front

Define homozygous.

Back

Homozygous refers to having two identical alleles for a particular gene (e.g., YY or yy).

Front

Define heterozygous.

Back

Heterozygous refers to having two different alleles for a particular gene (e.g., Yy).

Front

What are alleles?

Back

Alleles are different forms of a gene that can exist at a specific locus on a chromosome.

Front

What does it mean for an allele to be dominant?

Back

A dominant allele is one that expresses its trait even when only one copy is present (e.g., B in Bb).

Front

What does it mean for an allele to be recessive?

Back

A recessive allele is one that only expresses its trait when two copies are present (e.g., bb).

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.

Front

How do you determine the phenotype from a genotype?

Back

The phenotype is determined by the expression of the alleles in the genotype, influenced by dominant and recessive relationships.

Front

What is the genotype for a homozygous dominant individual?

Back

The genotype for a homozygous dominant individual is represented as two uppercase letters (e.g., YY).