Pick out the correct statements.

I. Haemophilia is a sex-linked recessive disease

II. Down's syndrome is due to aneuploidy.

III. Phenylketonuria is an autosomal recessive gene disorder

IV. Sickle cell anaemia is an x - linked recessive gene disorder

(1) II and IV are correct

(2) I, III and IV are correct

(3) I, II and III are correct

(4) I and IV are correct

Subtopic:  Mendelian Disorders |
 75%
From NCERT
NEET - 2016
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If a colourblind man marries a woman who is homozygous for normal colour vision, the probability of their son being colourblind is:

1. 0

2. 0.5

3. 0. 75

4. 1

Subtopic:  Mendelian Disorders |
 81%
NEET - 2016
Please attempt this question first.
Hints

Pick out the correct statements:
I:  Haemophilia is a sex-linked recessive disease. 
II:  Down’s syndrome is due to aneuploidy. 
III:  Phenylketonuria is an autosomal recessive gene disorder. 
IV:  Sickle cell anaemia is an X-linked recessive gene disorder
1. II and IV are correct
2. I, III and IV are correct
3. I, II and III are correct
4. I and IV are correct
Subtopic:  Mendelian Disorders: Sickle Cell Anemia | Mendelian Disorders | Mendelian Disorders: Hemophilia | Non - Disjunction & Aneuploidy |
 79%
From NCERT
NEET - 2016
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch