Chemistry, asked by jessica2305, 6 months ago

In a plant 'Q', red and yellow flowers are seen. The gene for the red colour is dominant. A farmer cross-bred a pure breed of red flower plant with a pure breed of yellow flower plant. If the gene for the flower colour is denoted by letter R. i) What is the genotype of the two parent plants?

ii)Give the genotype and phenotype of the F1 generation plants.
iii)give all possible genotypes of f2 generation plants

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Answered by khushibinwal81

Answer:

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12th

Biology

Principles of Inheritance and Variation

Mendel's Experiments and Laws of Inheritance

A true breeding plant produ...

BIOLOGY

HARD

A true breeding plant producing red flowers is crossed with a pure plant producing white flowers. Allele for red colour of flower is dominant. After selfing the plants of first filial generation, the proportion of plants producing white flowers in the progeny would be

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ANSWER

A cross between pure breeding red (RR) and white (rr) flowered plants produces heterozygous red (Rr) offspring in first filial generation. Heterozygous red (Rr) offspring produce two types of gametes: 50% with R allele and 50% with r. Random fertilization of gametes with R and r alleles produces red and white flowered offspring in 3:1 ratio.

gametes Rr

Rr R r

R RR (red) Rr (red)

r Rr (red) rr (white)

This makes option B correct answer.

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