Heredity and Punnett Squares

Front

What is heredity?

Back

The passing of traits from parents to offspring through genes.

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Front

What is a Punnett Square?

Back

A diagram used to predict the outcome of a genetic cross by showing the possible allele combinations from the parents.

Tags

NGSS.HS-LS4-3

Front

Define homozygous.

Back

An organism with two identical alleles for a trait (e.g., AA or aa).

Front

Define heterozygous.

Back

An organism with two different alleles for a trait (e.g., Aa).

Front

What is a dominant allele?

Back

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

Front

What is a recessive allele?

Back

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

Front

What does genotype refer to?

Back

The genetic makeup of an organism, represented by the alleles it possesses.

Tags

NGSS.HS-LS3-2

NGSS.HS-LS4-2

Front

What does phenotype refer to?

Back

The observable physical or biochemical characteristics of an organism, determined by its genotype.

Front

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

Back

100%.

Tags

NGSS.HS-LS4-3

Front

What is the significance of the lowercase letter in genetics?

Back

It typically represents a recessive allele.