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प्रश्न
Distinguish between heterogametic and homogametic sex determination systems.
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उत्तर
| Heterogametic Sex | Homogametic Sex |
|
1. Organisms producing two different types of gametes. |
1. Organisms producing only one type of gametes. |
|
2. Example: Human male. |
2. Example: Human female. |
संबंधित प्रश्न
Does genetic combination of mother play a significant role in determining the sex of a new born baby?
Define the following:
Autosomes
Explain the following terms:
Identical twins
Complete the following sentence with appropriate word:
___________ chromosomes do not take part in sex determination.
Differentiate Intersexes from Supersexes.
A zygote which has an X-chromosome inherited from the father will develop into a ______.
Human offspring’s sex is determined ______
The maleness of a child 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?
A zygote which has Y chromosome inherited from the father will develop into a ______.
