Punnett Squares 24

Front

What is a genotype?

Back

A genotype is the genetic makeup of an organism, represented by the alleles it possesses (e.g., BB, Bb, bb).

Front

What does heterozygous mean?

Back

Heterozygous refers to having two different alleles for a specific gene (e.g., Bb).

Front

What is a phenotype?

Back

A phenotype is the observable physical or biochemical characteristics of an organism, determined by its genotype.

Front

What is co-dominance?

Back

Co-dominance is a form of inheritance where both alleles in a heterozygote are fully expressed, resulting in a phenotype that shows both traits (e.g., roan cows with orange and white fur).

Front

What is incomplete dominance?

Back

Incomplete dominance is a form of inheritance where the phenotype of a heterozygote is intermediate between the phenotypes of the two homozygotes.

Front

What is a Punnett square?

Back

A Punnett square is a diagram used to predict the genotypes of offspring from a genetic cross.

Front

What is the expected phenotype ratio from a cross between two roan cows?

Back

1: Orange: 2 Orange and White: 1 White.

Front

What does the term 'allele' mean?

Back

An allele is a variant form of a gene that can produce different traits.

Front

What is the genotypic ratio for a cross between BB and bb?

Back

100% Bb.

Front

What is the phenotypic ratio for a cross between Bb and Bb?

Back

3:1 (3 dominant phenotype: 1 recessive phenotype).