Punnett Squares

Front

Heterozygous is when...

Back

the alleles are different.

Front

In plants, tall (T) is dominant to short (t). What is the probability of producing a short plant when crossing Tt x Tt?

Back

25%.

Front

What you see, or the physical appearance, is called...

Back

Phenotype.

Front

Aa, DD, bB, yy are all examples of...

Back

genotypes.

Front

What offspring do you get when you cross two heterozygous parents (G=green scales; g=white scales)?

Back

GG, Gg, gg.

Front

What is a Punnett Square used for?

Back

To predict the genetic outcomes of a cross between two organisms.

Front

What does the term 'dominant' mean in genetics?

Back

A dominant allele is one that expresses its trait even when only one copy is present.

Front

What does the term 'recessive' mean in genetics?

Back

A recessive allele is one that only expresses its trait when two copies are present.

Front

If a plant has the genotype Tt, what is its phenotype?

Back

Tall, because T (tall) is dominant.

Front

What is the genotype of a homozygous tall plant?

Back

TT.