NEET : Multiple Choice questions: Polygenic inheritance & Pedigree analysis

1. Consider the following sentences and select the number of  correct statements.

1. An  analysis of trait of several generation of a family is called Pedigree analysis .

2.  In a Pedigree analysis , inheritance of a particular trait is represented by a tree diagram called Pedigree chart.

3. In human genetics, Pedigree analysis is strong tool to trace the inheritance of trait or genetic abnormalities.
4. Pedigree chart does not use any symbol for the representation.

A. Two           B. Three

C. Four           D. One

Answer : B Explanation 

2. The inheritance of which of the following  particular disorder is traced by the Pedigree analysis.

A. Mendel disorder

B. Chromosomal disorder

C. Pathogenic disease

D. Nutrient deficiency disorder.

Answer : A Explanation

3. Pedigree analysis make easy to understand the trait is 

A. Autosomal dominant

B. Autosomal recessive 

C. Sex linked

D. All of the above

Answer : D Explanation

4. The given symbol used in  Pedigree  analysis show

 

A. Mating between close offspring.

B. Mating between close relative.

C.Consanguinous mating

D. All of the above

Answer : D Explanation

5. The given symbol 🔴 And 🟥used in  Pedigree  analysis show respectively:

A. Affected female and male .

B. Normal male and female

C. Normal female and male

D. Affected male and female 

Answer: A Explanation

6.What does below Pedigree symbol show 

A. Five carrier female 

B. Five normal male 

C. Five affected individual

D. Five carrier male

Answer : C Explanation

7. Given Pedigree chart  belong to disorder Myotonic dystrophy which is 

A. Autosomal dominant

B. Autosomal recessive

C. Sex linked recessive 

D. Sex linked dominant 

Answer : A Explanation

8. Given Pedigree chart  belong to disorder that is 

A. Autosomal dominant

B. Autosomal recessive

C. Sex linked recessive 

D. Sex linked dominant 

Answer : B Explanation

9. Which one of the following is an example of polygenic inheritance.

A. Blood group8

B. Human skin color 

C. Plasma protein 

D. Haemoglobin 

Answer: B Explanation

10. Which one of the following statement is not correct for polygenic trait.

A. This trait is controlled by the more than two alleles.

B. This traits is affected by the environment.

C. Each allele put effect on phenotype and such allele is additive.

D.Allele aabbcc has light skin color which is dominant over the AABBCC code for dark skin color

Answer: D Explanation

11. Which one of the following statement is /are correct for polygenic trait.

A. Gene A, B and C gene control human skin color.

B. Hybrid with allele AaBbCc than it show intermediate skin color.

C. The genotype with allele AABBCC has dark skin color and genotype aabbcc has light skin color.

D. All of the above.

Answer: D Explanation