Genetics: Punnett Squares

Front

What is a heterozygous allele pair?

Back

An allele pair consisting of two different alleles, such as Qq.

Front

What is a homozygous allele pair?

Back

An allele pair consisting of two identical alleles, such as BB or rr.

Front

What is the probability of offspring showing a dominant trait if the Punnett square shows 75% dominance?

Back

75%.

Front

What is a homozygous recessive allele pair?

Back

An allele pair consisting of two recessive alleles, such as rr.

Front

What is the probability of offspring having homozygous alleles if the Punnett square shows 50% homozygosity?

Back

50%.

Front

Define allele.

Back

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

Front

What does a Punnett square illustrate?

Back

A Punnett square illustrates the possible genetic combinations of offspring from two parents.

Front

What is the difference between dominant and recessive traits?

Back

Dominant traits are expressed when at least one dominant allele is present, while recessive traits are expressed only when two recessive alleles are present.

Front

How do you determine the genotype from a Punnett square?

Back

The genotype is determined by the combination of alleles represented in the squares of the Punnett square.

Front

What does it mean if an organism is homozygous dominant?

Back

It means the organism has two dominant alleles for a trait, such as AA.