In pea plants, the allele for yellow seeds ( $Y$ ) is dominant to the allele for green seeds ( $y$ ).

Two heterozygous yellow-seeded plants ( $Y y$ ) are crossed.

Complete the Punnett square below to show the possible genotypes of the offspring by identifying the genotypes represented by the letters $A$ , $B$ , $C$ , and $D$ :

GametesYyYAByCD\begin{array}{c|c|c} \text{Gametes} & Y & y \\ \hline Y & A & B \\ \hline y & C & D \\ \end{array}

State the probability (as a percentage) that an offspring seed will be green.

A single pod from this cross is found to contain 12 seeds. Explain why there might not be exactly 3 green seeds in this pod.

In pea plants, the allele for yellow seeds ( $Y$ ) is dominant to the allele for green seeds ( $y$ ).

Two heterozygous yellow-seeded plants ( $Y y$ ) are crossed.

Complete the Punnett square below to show the possible genotypes of the offspring by identifying the genotypes represented by the letters $A$ , $B$ , $C$ , and $D$ :

GametesYyYAByCD\begin{array}{c|c|c} \text{Gametes} & Y & y \\ \hline Y & A & B \\ \hline y & C & D \\ \end{array}

State the probability (as a percentage) that an offspring seed will be green.

A single pod from this cross is found to contain 12 seeds. Explain why there might not be exactly 3 green seeds in this pod.

6.1 Reproduction

Question 21

Markscheme

6.1 Reproduction

Question 21

Markscheme

6.1 Reproduction

Question 21

6.1 Reproduction Questions

6.1 Reproduction

Question 21

6.1 Reproduction Questions