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Principles of Inheritance and Variation · Question 52

NEET (UG) 2019MCQEasy📈 Topic in 25% papers+4−1
1

Select the incorrect statement.

  1. In domesticated fowls, sex of progeny depends on the type of sperm rather than egg.
  2. Human males have one of their sex-chromosome much shorter than the other.
  3. Male fruit fly is heterogametic
  4. In male grasshoppers, 50\% of sperms have no sex-chromosome.

Answer

(1) In domesticated fowls, sex of progeny depends on the type of sperm rather than egg.

Solution

As per NCERT, in birds a female heterogamety is observed: females have ZW and males ZZ sex chromosomes.

Females produce two types of eggs (Z and W) while all sperms carry Z, so in fowls the sex of the progeny depends on the type of egg, not on the sperm. Statement (1) is incorrect.

(2) Human males are XY; the Y chromosome is much shorter than X — correct.

(3) Male Drosophila is XY, i.e., heterogametic — correct.

(4) Male grasshopper is XO, so 50\% of sperms carry X and 50\% carry no sex chromosome — correct.

Answer: (1)

NEET (UG) 2019

Keep practising — Principles of Inheritance and Variation

2

Which of the following pairs is wrongly matched?

  1. Starch synthesis in pea : Multiple alleles
  2. ABO blood grouping : Co-dominance
  3. XO type sex determination: Grasshopper
  4. T.H. Morgan : Linkage
NEET 2018
3

Which of the following characteristics represent 'Inheritance of blood groups' in humans?

  1. B, C and E only
  2. A, B and C only
  3. B, D and E only
  4. A, C and E only
NEET 2018
4

A woman has an X-linked condition on one of her X chromosomes. This chromosome can be inherited by

  1. only daughters
  2. only sons
  3. only grandchildren
  4. both sons and daughters
NEET 2018
5

Select the correct statement :

  1. Franklin Stahl coined the term “linkage”.
  2. Punnett square was developed by a British scientist.
  3. Spliceosomes take part in translation.
  4. Transduction was discovered by S. Altman.
NEET 2018
6

Thalassemia and sickle cell anemia are caused due to a problem in globin molecule synthesis. Select the correct statement.

  1. Both are due to a qualitative defect in globin chain synthesis
  2. Thalassemia is due to less synthesis of globin molecules
  3. Sickle cell anemia is due to a quantitative problem of globin molecules
  4. Both are due to a quantitative defect in globin chain synthesis
NEET 2017
7

The genotypes of a Husband and Wife are IAIB and IAi. Among the blood types of their children, how many different genotypes and phenotypes are possible?

  1. 4 genotypes ; 3 phenotypes
  2. 4 genotypes ; 4 phenotypes
  3. 3 genotypes ; 4 phenotypes
  4. 3 genotypes ; 3 phenotypes
NEET 2017
8

A disease caused by an autosomal primary non-disjunction is :

  1. Klinefelter's Syndrome
  2. Down's Syndrome
  3. Turner's Syndrome
  4. Sickle Cell Anemia
NEET 2017
9

Which one from those given below is the period for Mendel's hybridisation experiments ?

  1. 1870 – 1877
  2. 1857 – 1869
  3. 1840 – 1850
  4. 1856 – 1863
NEET 2017
10

Among the following characters, which one was not considered by Mendel in his experiments on pea?

  1. Stem-Tall or dwarf
  2. Pod-Inflated or constricted
  3. Trichomes-Glandular or non-glandular
  4. Seed-Green or yellow
NEET 2017
11

A cell at telophase stage is observed by a student in a plant brought from the field. He tells his teacher that this cell is not like other cells at telophase stage. There is no formation of cell plate and thus the cell is containing more number of chromosomes as compared to other dividing cells. This would result in -

  1. Polyteny
  2. Aneuploidy
  3. Polyploidy
  4. Somaclonal variation
NEET 2016 (Phase 1)

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