Question

Study the given data and answer the questions following the data:

$\begin{array}{ccc}\text{Parental plants cross}& \text{FI First Generation}& \text{F2 offsprings}\\ \text{fertilized and seeds collected}& \text{offsprings}& \text{of self pollination of Fl}\\ \text{Male parents always bear red flowers.}& \text{330 seeds}& \text{Out of 44 seeds 33 seeds are plants with red}\\ \text{Female parent always had white flowers,}& \text{sown and observed. All 330 are red flowers.}& \text{flowers and 11 seeds are plants with white flowers.}\end{array}$

i. What is the term used for this type of cross?

ii. What does the data of the column marked F1 indicate?

iii. Express the genotype of the (a) parents (b) F1 progeny and (c ) F2 progeny

Answer 1

i. Monohybrid cross.

ii. Since all the flower in F1 progeny is red we can say that red colour is dominant over white colour.

iii. Genotype of the

(a) Parents - Red - RR

White - rr

(b) Fl progeny - Rr

(c ) F2 progeny - RR. Rr and rr