Questions
When a tall pea plant of heterozygous genotype is testcrossed, we obtain 100 pea plants in the progeny. Calculate the number of pea plants that will be tall and dwarf respectively.
a
75 Tall and 25 Dwarf
b
50 Tall and 50 Dwarf
c
25 Tall and 75 Dwarf
d
100 Tall and 0 Dwarf
detailed solution
Correct option is B
When a tall pea plant of heterozygous genotype is testcrossed, the phenotypic ratio will be 1 (tall):1(dwarf). Therefore, if total number of progeny is 100. Then 50% of the offspring will be tall and 50% will be dwarf. So, 50 pea plants will be tall and 50 will be dwarf.Talk to our academic expert!
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A cross between a homozygous recessive and a heterozygous plant is called
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