Question

In the F2 generation of a cross of
two cultivated varieties of tobacco,
the number of leaves per plant was
distributed according to a normal
distribution, with mean 7 and
standard deviation 3. What proportion
of the population is expected to have
the following phenotypes?
(a) Between 15 and 21 leaves
(b) Between 12 and 24 leaves
(c) Fewer than 15 leaves
(d) More than 24 leaves
(e) Between 21 and 24 leaves​

Answer 1

Answer:

The dihybrid cross is a cross between two different genes means a cross between two different characters.

In F2 generation - 4 phenotypes are present (yellow round, Green round, yellow wrinkled and green wrinkled)

And 9 genotypes are present (1:2:1:2:4:2:1:2:1)

So the correct answer is "Phenotypes-4, Genotypes-9".

solution

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