1
NEET 2019
MCQ (Single Correct Answer)
+4
-1
What map unit (Centimorgan) is adopted in the construction of genetic maps?
A
A unit of distance between genes on chromosomes, representing 1% cross over.
B
A unit of distance between genes on chromosomes, representing 50% cross over.
C
A unit of distance between two expressed genes, representing 10% cross over.
D
A unit of distance between two expressed genes, representing 100% cross over.
2
NEET 2019
MCQ (Single Correct Answer)
+4
-1
A gene locus has two alleles A, a. If the frequency of dominant allele A is 0.4, then what will be the frequency of homozygous dominant, heterozygous and homozygous recessive individuals in the population?
A
0.16(AA); 0.48 (Aa); 0.36(aa)
B
0.16 (AA); 0.36(Aa); 0.48(aa)
C
0.36 (AA); 0.48 (Aa); 0.16 (aa)
D
0.16 (AA); 0.24 (Aa); 0.36 (aa)
3
NEET 2019
MCQ (Single Correct Answer)
+4
-1
Select the incorrect statement.
A
In domesticated fowls, sex of progeny depends on the type of sperm rather than egg.
B
Human males have one of their sex-chromosome much shorter than the other.
C
Male fruit fly is heterogametic
D
In male grasshoppers, 50% of sperms have no sex-chromosome.
4
NEET 2018
MCQ (Single Correct Answer)
+4
-1
A woman has an X-linked condition on one of her X chromosomes. This chromosome can be inherited by
A
only daughters
B
only sons
C
only grandchildren
D
both sons and daughters
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