1
AIIMS 2018
MCQ (Single Correct Answer)
+1
-0.33

A normal woman whose father was colourblind, marries a normal man. What kinds of children can be expected and in what proportion?

A
All daughters normal, $$50 \%$$ of sons colourblind
B
All daughters normal, all sons colourblind
C
$$50 \%$$ daughters colourblind, all sons normal
D
All daughters colourblind, all sons normal
2
AIIMS 2018
MCQ (Single Correct Answer)
+1
-0.33

Which one of the following conditions correctly describes the manner of determining the sex?

A
Homozygous sex chromosomes (ZZ) determine female sex in birds
B
XO type of sex chromosomes determine male sex in grasshopper
C
XO condition in humans as found in Turner's syndrome determines female sex
D
Homozygous sex chromosomes (XX) produce males in Drosophila
3
AIIMS 2018
MCQ (Single Correct Answer)
+1
-0.33

Assertion Phenylketonuria is recessive hereditary disease caused by body’s failure to oxidise an amino acid phenylalanine to tyrosine, because of defective enzyme.

Reason It is characterised by in the presence of phenylalanine acid in urine.

A
Both A and R are true and R is the correct explanation of A
B
Both A and R are true, but R is not the correct explanation of A
C
A is true, but R is false
D
A and R are false
4
AIIMS 2018
MCQ (Single Correct Answer)
+1
-0.33

Assertion The non-allelic genes for red hair and prickles are usually inherited together.

Reason The genes for red hair and prickles are located on the same chromosome in close association.

A
Both A and R are true and R is the correct explanation of A
B
Both A and R are true, but R is not the correct explanation of A
C
A is true, but R is false
D
A and R are false
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