Principles Of Inheritance And Variation — DPP 4

9 NEET questions from Principles Of Inheritance And Variation, with answers and explanations. Attempt it as a timed test to get scoring, accuracy breakdown and mistake tracking.

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1
If a heterozygous tall plant is crossed with a homozygous dwarf plant then what shall be the percentage of dwarf offsprings :-
  1. A $25 \%$
  2. B $100 \%$
  3. C $75 \%$
  4. D $50 \%$
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Correct answer: D

2
A cross between AaBB X aaBB yields a genotypic ratio of :-
  1. A 1 AaBB: 1 aaBB
  2. B 1 AaBB : 3 aaBB
  3. C 3AaBB : 1 aa BB
  4. D All AaBb
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Correct answer: A

3
If a cross is made between AA and aa, the nature of $\mathrm{F _ { 1 }}$ progeny will be :-
  1. A genotypically AA, phenotypically a
  2. B genotypically Aa, phenotypically a
  3. C genotypically Aa, phenotypically A
  4. D genotypically aa, phenotypically A
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Correct answer: C

4
If a homozygous tall plant is crossed with a dwarf plant, what shall be the ratio of plants in offsprings :-
  1. A All heterozygous tall
  2. B Two tall & Two dwarf
  3. C $1 : 2 : 1$
  4. D All homozygous dwarf
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Correct answer: A

5
How many types of gametes are expected from the organism with genotype $\mathrm{AABBCC}$:-
  1. A One
  2. B Two
  3. C Four
  4. D Eight
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Correct answer: A

6
When a red flower homozygous pea plant is crossed with a white flower plant what colour is produced in $\mathrm{F _ { 1 }}$ generation:-
  1. A Red
  2. B White
  3. C Pink
  4. D Red + white
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Correct answer: A

7
A plant of $\mathrm{F _ { 1 }}$ generation with genotype "$\mathrm{AABbCC}$". On selfing of this plant what is the phenotypic ratio in $\mathrm{F _ { 2 }}$ generation :-
  1. A $3 : 1$
  2. B $1 : 1$
  3. C $9 : 3 : 3 : 1$
  4. D $27 : 9 : 9 : 9 : 3 : 3 : 3 : 1$
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Correct answer: A

8
A pure tall and a pure dwarf plant were crossed to produce offsprings. Offsprings were self crossed, then find out the ratio between true breeding tall to true breeding dwarf :-
  1. A $1 : 1$
  2. B $3 : 1$
  3. C $2 : 1$
  4. D $1 : 2 : 1$
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Correct answer: A

9
In a cross between a pure tall plant with green pod & a pure short plant with yellow pod. How many short plants are produced in $F _ { 2 }$ generation out of 16 :-
  1. A 1
  2. B 3
  3. C 4
  4. D 9
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Correct answer: C

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