MCQ on Biometrical Genetics / Quantitative Genetics Part -8 For ARS NET / SRF Exams

 

1. The allele that express itself i.e. produces the character governed by it, in the heterozygous state is known as dominant, while that unable to do so is called recessive; this phenomenon is known as
(i) Segregation
(ii) Uniform Expressivity
(iii) Dominance
(iv) Variable Expressivity

2. When the heterozygote is comparable to one of the homozygotes is called as
(i) Partial or incomplete dominance
(ii) Co-dominance
(iii) Complete dominance
(iv) Over-dominance

3. When the heterozygote is intermediate between the two homozygotes is called as
(i) Partial or incomplete dominance
(ii) Co-dominance
(iii) Complete dominance
(iv) Over-dominance

4. If both the alleles of a gene express themselves in heterozygotes is called as
(i) Partial or incomplete dominance
(ii) Co-dominance
(iii) Complete dominance
(iv) Over-dominance

5. Performance of the heterozygote for a gene exceeds that of both the concerned homozygotes is known as
(i) Partial or incomplete dominance
(ii) Co-dominance
(iii) Complete dominance
(iv) Over-dominance

6. At the time of gamete formation, two alleles of a gene present in the F₁ separate and passes into different gametes; this is known as
(i) Segregation
(ii) Uniform Expressivity
(iii) Independent assortment
(iv) Variable Expressivity

7. The transmission of any one alleles of one gene into gamete does not affect the like-hood of transmission into the same gamete of the alleles of the other gene is known as
(i) Segregation
(ii) Uniform Expressivity
(iii) Independent assortment
(iv) Variable Expressivity

8. When a single major gene (oligogene) affect more than one character is known as
(i) Pleiotropy
(ii) Modifying genes
(iii) Threshold characters
(iv) Variable Expressivity