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Principles of Inheritance and Variation · Question 63

NEET 2016 (Phase 1)MCQEasy📈 Topic in 50% papers+4−1
1

Pick out the correct statements :

  1. A, B and C only
  2. A, C and D only
  3. A and D only
  4. B and D only

Answer

(1) A, B and C only

Solution

A: Haemophilia is a sex-linked (X-linked) recessive disease — correct.

B: Down's syndrome is caused by trisomy of chromosome 21, i.e. aneuploidy — correct.

C: Phenylketonuria is an inborn error of metabolism inherited as an autosomal recessive trait — correct.

D: Sickle-cell anaemia is an autosome-linked recessive trait, not X-linked — incorrect.

∴ A, B and C are correct.

Answer: (1)

NEET 2016 (Phase 1)

Keep practising — Principles of Inheritance and Variation

2

A tall true breeding garden pea plant is crossed with a dwarf true breeding garden pea plant. When the F1 plants were selfed the resulting genotypes were in the ratio of -

  1. 3 : 1 :: Tall : Dwarf
  2. 1 : 2 : 1 :: Tall heterozygous : Tall homozygous : Dwarf
  3. 1 : 2 : 1 :: Tall homozygous : Tall heterozygous : Dwarf
  4. 3 : 1 :: Dwarf : Tall
NEET 2016 (Phase 1)
3

Match the terms in Column-I with their description in Column-II and choose the correct option :

  1. (a)-(ii), (b)-(iii), (c)-(iv), (d)-(i)
  2. (a)-(iv), (b)-(i), (c)-(ii), (d)-(iii)
  3. (a)-(ii), (b)-(ii), (c)-(iv), (d)-(iii)
  4. (a)-(iv), (b)-(iii), (c)-(i), (d)-(ii)
NEET 2016 (Phase 1)
4

In a testcross involving F1 dihybrid flies, more parental-type offspring were produced than the recombinant-type offspring. This indicates

  1. Both of the characters are controlled by more than one gene
  2. The two genes are linked and present on the same chromosome
  3. The two genes are located on two different chromosomes
  4. Chromosomes failed to separate during meiosis
NEET 2016 (Phase 1)
5

Which of the following most appropriately describes haemophilia ?

  1. Chromosomal disorder
  2. X-linked recessive gene disorder
  3. Dominant gene disorder
  4. Recessive gene disorder
NEET 2016 (Phase 1)
6

The mechanism that causes a gene to move from one linkage group to another is called

  1. crossing-over
  2. translocation
  3. duplication
  4. inversion
NEET 2016 (Phase 2)
7

If a colour-blind man marries a woman who is homozygous for normal colour vision, the probability of their son being colour-blind is

  1. 0.75
  2. 0.5
  3. 0
  4. 1
NEET 2016 (Phase 2)
8

A true breeding plant is -

  1. produced due to cross-pollination among unrelated plants
  2. one that is able to breed on its own
  3. near homozygous and produces offspring of its own kind
  4. always homozygous recessive in its genetic constitution
Out of syllabusNEET 2016 (Phase 2)
9

The movement of a gene from one linkage group to another is called

  1. inversion
  2. translocation
  3. duplication
  4. crossing over
AIPMT 2015 (Cancelled)
10

Alleles are

  1. true breeding homozygotes
  2. different phenotype
  3. heterozygotes
  4. different molecular forms of a gene
AIPMT 2015 (Cancelled)
11

Multiple alleles are present

  1. on different chromosomes
  2. at the same locus of the chromosome
  3. at different loci on the same chromosome.
  4. on non-sister chromatids
AIPMT 2015 (Cancelled)

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All NEET Botany chapters
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