Punnett Square Genetics

Front

What is a Punnett Square used for?

Back

A Punnett Square is used to predict the genotypes and phenotypes of offspring from a genetic cross.

Front

What does the term 'genotype' refer to?

Back

The genotype refers to the genetic make-up of an organism, represented by the alleles it possesses.

Front

What does the term 'phenotype' refer to?

Back

The phenotype refers to the physical traits or characteristics of an organism, resulting from the interaction of its genotype with the environment.

Front

What is the genotype of a homozygous dominant organism?

Back

The genotype of a homozygous dominant organism is represented by two identical dominant alleles, such as 'AA'.

Front

What is the genotype of a homozygous recessive organism?

Back

The genotype of a homozygous recessive organism is represented by two identical recessive alleles, such as 'aa'.

Front

What is the genotype of a heterozygous organism?

Back

The genotype of a heterozygous organism consists of one dominant and one recessive allele, represented as 'Aa'.

Front

If 'A' represents a dominant allele and 'a' represents a recessive allele, what phenotype does 'AA' express?

Back

The phenotype expressed by 'AA' is the dominant trait.

Front

In a cross between Tt (tall) and tt (short) pea plants, what are the possible genotypes of the offspring?

Back

The possible genotypes of the offspring are 50% Tt (tall) and 50% tt (short).

Front

What is complete dominance in genetics?

Back

Complete dominance occurs when the dominant allele completely masks the effect of the recessive allele in the phenotype.

Front

If 'A' = red fur and 'a' = white fur, what color fur would 'Aa' be?

Back

The color fur of 'Aa' would be red due to the dominance of the 'A' allele.