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Question
Assertion :In humans, most sex-linked genes are present on the X chromosome. Reason: X-chromosome contains a large number of genes with major effects on phenotype.
Assertion :In humans, most sex-linked genes are present on the X chromosome. Reason: X-chromosome contains a large number of genes with major effects on phenotype.
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Solution
The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
Most sex - linked genes in male heterogametic animals are present on the
X- chromosome. Some animals, however, may carry a few genes on the Y
chromosome that produce visible effects on the phenotype of
the organism. Y linkage is very rare in higher animal, particularly
mammals. X linkage, on the other hand, is very common in all mammals
that have been studied, the mammalian X chromosome contains a
larger number of genes with major effects on phenotype.So, the correct answer is 'Both Assertion and Reason are correct and Reason is the correct explanation for Assertion'.
Most sex - linked genes in male heterogametic animals are present on the
X- chromosome. Some animals, however, may carry a few genes on the Y
chromosome that produce visible effects on the phenotype of
the organism. Y linkage is very rare in higher animal, particularly
mammals. X linkage, on the other hand, is very common in all mammals
that have been studied, the mammalian X chromosome contains a
larger number of genes with major effects on phenotype.
So, the correct answer is 'Both Assertion and Reason are correct and Reason is the correct explanation for Assertion'.
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