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प्रश्न
What is male heterogamety?
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उत्तर
Male heterogamety (XY males) is a type of sex determination in which males produce two different types of gametes. For example, human males produce two kinds of sperms that is sperm with X- chromosome and sperms with Y- chromosome.
संबंधित प्रश्न
How is the sex of the child determined in human beings?
There are two sets of chromosomes in the zygote.
In a human, how many chromosmes are present in a fertilised egg?
Which combination of genes in the zygote will produce children with blue eyes?
Short Answer Question.
“Father is responsible for determination of sex of child and not the mother”. Justify.
Explain the mechanism of sex determination in humans with a suitable chart.
A trait in an organism is influenced by
The number of pair (s) of sex chromosomes in the zygote of humans is
Also describe as to, who determines the sex of an unborn child? Mention whether temperature has a role in sex determination.
All human chromosomes ate not paired. Most human chromosomes have a maternal and a paternal copy, and we have 22 such pairs. But one pair called the sex chromosomes, is odd in not always being a perfect pair. Women have a perfect pair of sex chromosomes. But men have a mismatched pair in which one is normal sized while the other is a short one.
(a) In humans, how many chromosomes are present in a Zygote and in each gamete?
(b) A few reptiles rely entirely on environmental cues for sex determination. Comment.
(c) "The sex of a child is a matter of chance and none of the parents are considered to be responsible for it." Justify it through flow chart only.
OR
(c) Why do all the gametes formed in human females have an X chromosome?
