Give differences : Male heterogamety and Female heterogamety
Male heterogamety | Female heterogamety |
$(1)$ Male produces two types of gametes. | $(1)$ Female produces two types of gametes |
$(2)$ e.g. Human male produces gametes of $\mathrm{X}$ and $Y$-types. | $(2)$ e.g. Female birds produces gametes of $Z$ and $\mathrm{W}$ types. |
Select the incorrect statement
$A$ : $XO$ type sex determination is found in large number of insects.
$R$ : Some of the sperms bear the $X-$chromosome whereas some do not
How is sex determined in Honey bee ?
Bird females have chromosome arrangement as
In man the normal number of chromosomes is