Punnett Square Review

Front

What does it mean to be homozygous?

Back

Having two of the SAME genes/alleles for a trait (sometimes called purebred).

Front

How many alleles does an offspring receive from each parent for a specific trait?

Back

One allele from each parent.

Front

What is the term for an organism with two different alleles for a trait, such as Bb?

Back

Hybrid.

Front

If two heterozygous tall pea plants (Tt) are crossed, what percentage of their offspring will be tall?

Back

75% tall and 25% short.

Front

What is heredity?

Back

The passing of genetic traits from parent to offspring.

Front

What is a genotype?

Back

The genetic makeup of an organism, represented by alleles (e.g., Bb, TT).

Front

What is a phenotype?

Back

The physical appearance or observable traits of an organism (e.g., tall, short).

Front

What is the purpose of a Punnett Square?

Back

To predict the possible genetic combinations of offspring from a cross between two parents.

Front

What are alleles?

Back

Different forms of a gene that determine specific traits.

Front

What does it mean to be heterozygous?

Back

Having two different alleles for a trait (e.g., Bb).