Genetics Question Online Test 11

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

1. Mendel grouped all contrasting characteristics in _______ pairs.

• 15
• 14
• 7
• 6

2. The conclusion drawn by Mendel based on monohybrid cross was

• each factor exist in two contrasting or alternative forms
• one of the forms is dominant and other is recessive.
• inheritance of each character is controlled by a pair of factors
• all of the above

3. From the reappearance of recessive trait in F₂ generation, Mendel concluded that

• factors do not mix with each other in F₁ generation
• factors remain together in F₁ generation
• factor mix with each other in F₁ generation
• both (A) and (B)

4. During gamete formation

• diploid gametes are formed
• each gamete receives only one factor
• factors do not segregate
• all offsprings show recessive characters

5. The crossing of a homozygous tall pea plant and homozygous dwarf pea plant would yield plants in the ratio of

• 2 tall : 2 dwarf
• all homozygous dwarf
• all heterozygous tall
• one homozygous tall : one homozygous dwarf : two heterozygous tall

6. Mendel crossed a pure white flowered pea plant with pure red flowered plant. The first generation of hybrids from the cross should show

• 75% red flowered and 25% white flowered plants
• 50% white flowered and 50% red flowered plants
• all red flowered plants
• all white flowered plants

7. In monohybrid cross between pure tall and pure dwarf pea plant, how many types of genotypes are found in F2 generation ?

• 4
• 3
• 8
• 9

8. Out of the four progenies obtained in F2 generation by crossing pure tall and pure dwarf, how many of them will receive only recessive trait from both parents?

• all four
• one
• two
• three

9. The monohybrid ratio is defined as

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

10. Which of the following is phenotypic ratio of Mendel’s monohybrid cross ?

• 1:2:1
• 3:1
• 1:1:2
• 1:3

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