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प्रश्न
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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उत्तर
As a rule the heterogametic organism determines the sex of the unborn child. In case of humans, since males are heterogametic it is the father and not the mother who decides the sex of the child. In some animals like crocodiles, lower temperature favour hatching of female offsprings and higher temperatures lead to hatching of male offsprings.
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संबंधित प्रश्न
Differentiate between male and female heterogamety.
There are ................ pairs of chromosomes in the human being.
Explain the mechanism of 'sex determination' in birds. How does it differ from that of human beings?
In a human, how many chromosmes are present in a brain cell?
In a human, how many chromosmes are present in an egg which has just been produced by the ovary?
Define the following:
Sex chromosomes
Answer the following question:
How is sex determined in human beings? Explain with the help of a diagram.
Give Technical Term:
The cell which determines the sex of a baby.
Which type of sex determination is observed in honey bee?
Chromosomal constitution of normal human females can be written as ______.
Sex is determined in human beings ______.
ZZ/ZW type of sex determination is seen in ______.
The number of pairs of sex chromosomes in the zygote of a human being is ______
Human offspring’s sex is determined ______
A zygote which has an X-chromosome inherited from the father will develop into a
The two versions of a trait (character) which are brought in by the male and female gametes are situated on
A woman has only daughters. Analyse the situation genetically and provide a suitable explanation.
Sex in honey bee is determined by ______.
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?
