Punnett Squares

Front

What is the genotype for a yellow plant if G = green and g = yellow?

Back

gg

Front

What term describes the physical appearance of an organism?

Back

Phenotype

Front

In a heterozygous genotype, which allele takes over in the phenotype?

Back

dominant

Front

If tall (T) is dominant to short (t), what is the probability of producing a short plant from a Tt x Tt cross?

Back

25%.

Front

What are the possible offspring genotypes when crossing two heterozygous parents with G=green scales and g=white scales?

Back

GG, Gg, gg.

Front

What is the definition of a genotype?

Back

The genetic makeup of an organism, represented by alleles.

Front

What is the difference between dominant and recessive alleles?

Back

Dominant alleles express their trait even in the presence of a recessive allele, while recessive alleles only express their trait when two copies are present.

Front

What is a Punnett square used for?

Back

To predict the genotypes and phenotypes of offspring from a genetic cross.

Front

What does it mean if an organism is homozygous?

Back

It has two identical alleles for a particular gene.

Front

What does it mean if an organism is heterozygous?

Back

It has two different alleles for a particular gene.