OBJECTIVE LIFE SCIENCE
GENETICS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Some of the ratios that Morgan investigated in genetic crosses did not correspond with expected Mendelian ratios. What was the cause?
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The genetic crosses used insects rather than plants.
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The results were counted more reliably than Mendel’s.
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The genes in the genetic crosses were linked.
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Drosophila has more genes than plants.Drosophila has more genes than plants.
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Explanation:
Detailed explanation-1: -Drosophila has more genes than plants. This is the cross that led to the discovery of non-Mendelian ratios in Morgan’s experiments with Drosophila.
Detailed explanation-2: -Thomas Hunt Morgan, who studied fruit flies, provided the first strong confirmation of the chromosome theory. Morgan discovered a mutation that affected fly eye color. He observed that the mutation was inherited differently by male and female flies.
Detailed explanation-3: -Complete linkage. Incomplete linkage. 02-Sept-2020
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