Punnett Squares

Front

What are the possible genotypes for a cross between two heterozygous individuals (Tt x Tt)?

Back

TT = 25%, Tt = 50%, tt = 25%.

Front

What inheritance pattern is observed when both alleles are expressed equally, such as in black and white checkered chickens?

Back

Codominance.

Front

In a Punnett square, if B = brown fur and b = white fur, what is the probability of obtaining a white fur offspring from a cross of Bb x Bb?

Back

50%.

Front

What is the term for a genetic condition where both alleles for a gene are expressed, resulting in both traits being visible?

Back

Codominance.

Front

What is the term for a genetic condition where the phenotype is a blend of the two parental traits, such as pink flowers from red and white parents?

Back

Incomplete dominance.

Front

What does a Punnett square illustrate in genetics?

Back

It shows the possible genotypes of offspring from a genetic cross.

Front

What is the expected phenotypic ratio for a monohybrid cross between two heterozygous individuals?

Back

3:1 ratio of dominant to recessive phenotypes.

Front

What is the difference between genotype and phenotype?

Back

Genotype refers to the genetic makeup, while phenotype refers to the observable traits.

Front

What is the significance of the F1 generation in genetics?

Back

The F1 generation is the first filial generation, resulting from a cross between the parental generation.

Front

How does codominance differ from incomplete dominance?

Back

In codominance, both alleles are fully expressed, while in incomplete dominance, the traits blend.