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Agriculture · Q133

Genetics And Plant Breeding

Graduate and Post Graduate · Agriculture · question 133

Q133

A mating among the following can not lead to heterosis

A.
AAbb × aaBB
B.
aaBBcc × AABBCC
C.
AABBccdd × AABBccdd
Answer
D.
AABBccdd × aabbCCDD

Answer: Option C

Solution

Answer: Option C
Solution:
Mating among the following cannot lead to heterosis is AABBccdd × AABBccdd.
Heterosis refers to the phenomenon that progeny of diverse varieties of a species or crosses between species exhibit greater biomass, speed of development, and fertility than both parents.
Various models have been posited to explain heterosis, including dominance, overdominance, and pseudo-overdominance.