#30-Mendelian-Disorders
(Botany) > Principles of Inheritance & Variation

My Notes

Create your notes while watching video by clicking on icon in video player.
Related Practice Questions :

What is the mode of inheritance of phenylketonuria?

1. Autosomal recessive

2. Autosomal dominant

3. Sex linked recessive

4. Sex linked dominant

 79%
From NCERT
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

Match each item in Column I with one item in Column II and chose your answer from the codes given below:

Column I

Disorder

Column II

Feature

I. Phenylketonuria

II. Sickle Cell anemia

III. Down's Syndrome

IV. Turner's Syndrome

(i) Rudimentary ovaries

(ii) Gynecomastia

(iii) Trisomy 21

(iv) Lack of enzyme PAH

(v) Lack of tyrosinase

(vi) Mutation GAG to GUG

(vii) Mutation GUG to GAG

 

1. I - v; II - vii; III - iii; IV - i

2. I - iv; II - vi; III - iii; IV - i

3. I - v; II - vi; III - iii; IV - ii

4. I - v; II - vi; III - iii; IV - i

 59%
From NCERT
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

Two phenotypically normal individuals have an affected child. What can we conclude about the parents?

1. they both carried the diesease allele

2. they are not the parents of the child

3. they are affected

4. no conclusions can be drawn

 86%
From NCERT
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

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

 75%
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

Which of the following is not an autosomal genetic disorder ?

(1) Sickle-cell anaemia

(2) Cystic fibrosis

(3) Haemophilia

(4) Huntington's disease

 74%
From NCERT
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