Genetics, Punnett Squares, and Heredity

Front

What is the probability of the offspring showing the recessive trait in a Punnett square with a 1:3 ratio?

Back

25%

Front

What does genotype refer to?

Back

The possible combination of alleles in a gene.

Front

Which of the following allele pairs is homozygous? Ee, BB, Tt?

Back

BB

Front

In a Punnett square, what does each box represent?

Back

Offspring.

Front

What is the definition of a dominant allele?

Back

An allele that expresses its trait even in the presence of a recessive allele.

Front

What is a recessive allele?

Back

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

Front

What does phenotype refer to?

Back

The physical expression of the genes.

Front

What is a Punnett square used for?

Back

To predict the probability of offspring inheriting particular traits.

Front

If T = tall and t = short, what is the genotype of a homozygous tall plant?

Back

TT.

Front

What is the difference between homozygous and heterozygous?

Back

Homozygous has two identical alleles; heterozygous has two different alleles.