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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
Differentiate between ‘ZZ’ and ‘XY’ type of sex-determination mechanisms.
What are the chromosomes XY and XX known as?
In a human, how many chromosmes are present in a sperm in the testes?
Choose the correct answer :
Human sex chromosomes are __________
Choose the correct answer:
A single recessive trait, able to express must be on _________
Match the items of Column I with Column II:
| Column I | Column II | ||
| i. | XX-XO method of Sex Determination | a. | Turner syndrome |
| ii. | XX-XY method of Sex Determination | b. | Female heterog ametic |
| iii. | karyotype-45 | c. | Grasshopper |
| iv. | ZW-ZZ method of Sex Determination | d. | Female homogametic |
Identify the organism in which ZZ-ZW type of sex determination is observed.
The number of pairs of sex chromosomes in the zygote of a human being is ______
The belief that the mother is completely responsible for the sex of the child is wrong because the child
In the XX–XY sex determination system, which sex is considered heterogametic and produces two different types of gametes?
