In man the normal number of chromosomes is

  • A

    $42$

  • B

    $44$

  • C

    $46$

  • D

    $48$

Similar Questions

Sex determination in Drosophila melanogaster is based on

  • [AIEEE 2004]

Match the items of column $I$ with column $II$

Column $I$ Column $II$
$(a)\; XX-XO$ method of sex determination  $(i)$ Turner's syndrome
$(b)\; XX-XY$ method of sex determination  $(ii)$ Female heterogametic
$(c)$ Karyotype$-45 $ $(iii)$ Grasshopper
$(d)\; ZW-ZZ$ method of sex determination  $(iv)$ Female homogametic

Select the correct option from the following

  • [NEET 2019]

Bird females have chromosome arrangement as

  • [AIIMS 2009]

What is heterogametic ? Explain by giving proper examples ?
 

Assertion : In humans, the gamete contributed by the male determines whether the child produced will be male or female.

Reason : Sex in humans is a polygenic trait depending upon a cumulative effect of some genes on $X-$ chromosome and some on $Y-$ chromosome.

  • [AIIMS 2005]