Punnett Square Genetics

Front

What is a Punnett Square?

Back

A Punnett Square is a diagram used to predict the outcome of a genetic cross by showing the possible combinations of alleles from the parents.

Front

What does homozygous dominant mean?

Back

Homozygous dominant refers to having two identical dominant alleles for a trait, represented as 'AA'.

Front

What does heterozygous mean?

Back

Heterozygous means having two different alleles for a trait, represented as 'Aa'.

Front

What is the phenotype of an organism?

Back

The phenotype is the physical expression or characteristics of a trait in an organism.

Front

What is the genotype of an organism?

Back

The genotype is the genetic makeup of an organism, representing the alleles it possesses.

Front

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

Back

red

Front

What is the expected genotype ratio from a cross between Tt (tall) and tt (short) pea plants?

Back

50% Tt, 50% tt

Front

What does complete dominance mean?

Back

Complete dominance occurs when the dominant allele completely masks the effect of the recessive allele in a heterozygous genotype.

Front

What is the difference between dominant and recessive alleles?

Back

Dominant alleles express their trait even when only one copy is present, while recessive alleles only express their trait when two copies are present.

Front

What does the term 'alleles' refer to?

Back

Alleles are different forms of a gene that can exist at a specific locus on a chromosome.