genetics, punnett squares, heredity

Front

What is a homozygous allele pair?

Back

A homozygous allele pair consists of two identical alleles for a particular gene, such as BB or bb.

Front

What is a heterozygous allele pair?

Back

A heterozygous allele pair consists of two different alleles for a particular gene, such as Bb.

Front

What does it mean when an allele is dominant?

Back

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

Front

What does it mean when an allele is recessive?

Back

A recessive allele only expresses its trait when two copies are present (e.g., tt).

Front

What is a Punnett square?

Back

A Punnett square is a diagram used to predict the genetic outcomes of a cross between two organisms.

Front

How do you calculate the probability of a trait using a Punnett square?

Back

Count the number of times the desired trait appears in the Punnett square and divide by the total number of outcomes.

Tags

NGSS.HS-LS3-3

Front

What is heredity?

Back

Heredity is the passing of traits from parents to offspring.

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Front

What is the probability of producing a homozygous recessive offspring from a Tt x Tt cross?

Back

25%.

Tags

NGSS.HS-LS3-3

Front

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

Back

75%.

Tags

NGSS.HS-LS4-3

Front

What is the genotype of an organism?

Back

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

Tags

NGSS.HS-LS1-1

NGSS.HS-LS3-2