Wednesday-Punnett Square

Front

What is a genotype?

Back

A genotype is the genetic constitution of an individual, represented by the alleles inherited from the parents.

Front

What does homozygous mean?

Back

Homozygous refers to having two identical alleles for a particular gene, such as YY or yy.

Front

What does dominant mean in genetics?

Back

Dominant refers to an allele that expresses its trait even when only one copy is present in the genotype.

Front

What is the phenotype?

Back

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

Front

What is the significance of a Punnett Square?

Back

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

Front

If red flower color (R) is dominant over white (r), what is the genotype of a white-flowering plant?

Back

The genotype of a white-flowering plant is rr.

Front

What is the phenotypic ratio of offspring from a heterozygous black mouse (Bb) crossed with a white mouse (bb)?

Back

The phenotypic ratio is 2 Black: 2 White.

Front

In pea plants, if tall (T) is dominant over short (t), what are the possible genotypes for tall plants?

Back

The possible genotypes for tall plants are TT and Tt.

Front

What is the expected phenotypic ratio for a monohybrid cross?

Back

The expected phenotypic ratio for a monohybrid cross is typically 3:1 for dominant to recessive traits.

Front

What does it mean if a trait is recessive?

Back

A recessive trait is one that is only expressed when two copies of the recessive allele are present in the genotype.