In $Bonellia$,all larvae are genetically and cellularly identical. The male individual lives in the uterus of the female. If a larva settles near the proboscis of an adult female,it develops into a male. If the larva develops freely in the water,it develops into a.....
- AMale
- BFemale
- CIntersex
- DNone of the above
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Organism with male heterogamety $- P$
Organism with female heterogamety $- Q$
$I -$ Human,$II -$ Bird,$III -$ Drosophila,$IV -$ Grasshopper
Select the correct option for $P$ and $Q$.
$\quad P \quad\quad Q$
Organism with female heterogamety $- Q$
$I -$ Human,$II -$ Bird,$III -$ Drosophila,$IV -$ Grasshopper
Select the correct option for $P$ and $Q$.
$\quad P \quad\quad Q$
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View SolutionHenking observed that in a few male insects,$50 \%$ of the sperm received a specific nuclear structure known as $X$-body,whereas the other $50 \%$ of sperms did not receive it. This method of sex determination was:
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View SolutionWhich one of the following conditions of the zygotic cell would lead to the birth of a normal human female child?
$(a)$ In humans,males are heterogametic and females are homogametic. Explain. Are there any examples where males are homogametic and females heterogametic?
$(b)$ Also describe as to who determines the sex of an unborn child? Mention whether temperature has a role in sex determination.
$(b)$ Also describe as to who determines the sex of an unborn child? Mention whether temperature has a role in sex determination.
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View SolutionThe formation of a male child depends on the sperms because
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