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Question

Study the given data and answer the questions following the data.
Parental plants cross fertilised and seeds collected F1 (first generation offspring) F2 (offspring of self pollination of F1)
Male parent always bore red flowers. 330 seeds sown and observed Out of 44 seeds, 33 seeds gave plants with red flowers and 11 seeds gave plants with white flowers
Female parent always had white flowers. All 330 gave red flowers
(a) What is the term for this type of cross?
(b) What does the data of the column marked F1 indicate?
(c) Express the genotype of the (i) parents (ii) F1 progeny, and (iii) F2 progeny.

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Solution

(a) It is a monohybrid cross.

(b) The data in column F1 indicates that red coloured flowers are dominant over white coloured flowers.

(c) The genotypes are as follows -
(i) Parents - RR, rr
(ii) F1 progeny - Rr
(iii) F2 progeny - RR, Rr, rr

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