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प्रश्न
Name the species used in sericulture. Name the stages in the life cycle of a silk moth in cyclic form.
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उत्तर
Species used in sericulture is Bombyx Mori - it produces mulberry silk.
Various stages in life cycle of silk moth in cyclic form are
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संबंधित प्रश्न
If X chromosome is inherited from mother and Y from father, the offspring will be male.
Fill in the following blank with suitable word :
The...............chromosomes for a ............are XX whereas that for a ..............are XY.
In a human, how many chromosmes are present in an egg which has just been produced by the ovary?
Kavitha gave birth to a female baby. Her family members say that she can give birth to only female babies because of her family history. Is the statement given by her family members true? Justify your answer.
Identify the organism in which ZZ-ZW type of sex determination is observed.
Grasshopper is an example of XO type of sex determination in which the males have ______.
Female heterogamy is shown by
In humans, males are heterogametic and females are homogametic. Explain. Are there any examples where males are homogametic and females heterogametic?
How many types of gametes are produced by a human female?
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?
