NEET BIOLOGY

GENETICS AND EVOLUTION

GENETIC BASIS OF INHERITANCE

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
The height of pea plants from a cross between parent plants heterozygous for height in which tall is dominant would be
A
all short.
B
all tall.
C
1 tall:3 short.
D
3 tall:1 short.
Explanation: 

Detailed explanation-1: -Out of the offspring produced, 50% will be tall and 50% will be dwarf.

Detailed explanation-2: -A heterozygous tall pea plant is crossed with the pure dwarf pea plant. The phenotypic ratio of breeding tall pea plants to breeding dwarf pea plants shall be 1:1.

Detailed explanation-3: -In pea plants, tall (T) plants are dominant over short (t) plants.

Detailed explanation-4: -As shown in the figure a cross between two heterozygous tall plants results in 25% homozygous tall, 50% heterozygous tall and 25% dwarf plants. Thus the correct answer is option C.

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