Genetics Question Online Test 12

Solve Genetics Questions Online Test for 11th and 12th, Bachelor Studies,competitive Examination like CSIR NET, CBSE NEET, IELTS, GRE etc .

1. The law of dominance is illustrated in the garden pea by

• heterozygous tall × heterozygous tall
• homozygous tall × homozygous tall
• pure short × pure dwarf
• homozygous tall × pure dwarf

2. Which of the following Mendel’s laws has not been proved to be true in all cases?

• Law of segregation
• Mendel’s second law of inheritance
• Law of dominance
• Law of purity of gametes

3. The second law of inheritance proposed by Mendel deals with

• dominance
• independent assortment
• segregation
• epistasis

4. Reappearance of recessive trait in F₂ generation is due to

• Law of independent assortment
• Law of dominance
• Law of codominance
• Law of purity of gametes

5. Which of the Mendel’s laws will always prove to be universally true in all cases?

• All three laws
• Only the 2^nd law
• 2^nd and 3^rd laws
• 1^st and 2nd laws

6. Mendel formulated the law of dominance and law of purity of gametes on the basis of

• test cross
• back cross
• monohybrid cross
• dihybrid cross

7. A cross between two pure individuals differing in two sets of characters is called

• dihybrid cross
• monohybrid cross
• trihybrid cross
• reciprocal cross

8. The phenotype of plant with genotype YyRr must be

• Yellow wrinkled
• Green round
• Yellow round
• green wrinkled

9. Dihybrid ratio is defined as

• phenotypic ratio obtained in F₂ generation of dihybrid cross
• phenotypic ratio obtained in F₁ generation of dihybrid cross
• genotypic ratio obtained in F₂ generation of dihybrid cross
• genotypic ratio obtained in F₁ generation of dihybrid cross

10. While performing dihybrid cross, Mendel

• selected a variety of pea plant having yellow and round seed as female parent and another variety having green and wrinkled seeds as a male parent
• obtained pure lines by selfing
• performed artificial cross by emasculation
• all of the above

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