genetics, punnett squares, heredity

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.

Tags

NGSS.HS-LS4-3

Front

Define homozygous dominant.

Back

Homozygous dominant refers to having two identical dominant alleles for a trait, such as 'BB' for brown fur.

Tags

NGSS.HS-LS1-1

Front

What is the probability of obtaining a homozygous dominant offspring from a cross of two heterozygous parents (Bb x Bb)?

Back

25%.

Tags

NGSS.HS-LS3-3

Front

What is a genotype?

Back

A genotype is the genetic makeup of an organism, represented by the alleles it possesses, such as 'Aa' or 'BB'.

Tags

NGSS.HS-LS1-1

NGSS.HS-LS3-2

Front

What is a phenotype?

Back

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

Tags

NGSS.HS-LS1-1

NGSS.HS-LS4-3

Front

What does it mean if an organism is homozygous?

Back

An organism is homozygous if it has two identical alleles for a specific gene, such as 'AA' or 'aa'.

Front

What does it mean if an organism is heterozygous?

Back

An organism is heterozygous if it has two different alleles for a specific gene, such as 'Aa'.

Tags

NGSS.HS-LS4-3

Front

In a Punnett Square, what does each box represent?

Back

Each box represents a possible genotype of the offspring resulting from the combination of alleles from the parents.

Front

If 'B' represents brown fur and 'b' represents white fur, what is the probability of getting a white-furred offspring from a cross of Bb x Bb?

Back

25%.

Tags

NGSS.HS-LS4-3

Front

What is the difference between dominant and recessive alleles?

Back

Dominant alleles mask the effect of recessive alleles in heterozygous conditions, meaning the dominant trait will be expressed.