1
NEET 2019
MCQ (Single Correct Answer)
+4
-1
Change Language
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
Change Language
In Antirrhinum (Snapdragon), a red flower was crossed with a white flower and in F1 generation, pink flowers were obtained. When pink flowers were selfed, the F2 generation showed white, red and pink flowers. Choose the incorrect statement from the following :
A
Ratio of F2 is $${1 \over 4}$$ (Red) : $${2 \over 4}$$ (Pink) : $${1 \over 4}$$ (White)
B
Law of Segregation does not apply in this experiment
C
This experiment does not follow the Principle of Dominance
D
Pink colour in F1 is due to incomplete dominance
3
NEET 2019
MCQ (Single Correct Answer)
+4
-1
Change Language
The frequency of recombination between gene pairs on the same chromosome as a measure of the distance between genes was explained by :
A
Alfred Sturtevant
B
Gregor J. Mendel
C
Sutton Boveri
D
T.H. Morgan
4
NEET 2019
MCQ (Single Correct Answer)
+4
-1
Change Language
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.

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