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प्रश्न
Drone of the honeybees shows haploid number of chromosomes. Illustrate.
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उत्तर
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संबंधित प्रश्न
A new born child has an XY pair of chromosmes. Will it be a baby boy or a baby girl?
A normal cell of human body contains 23 pairs of chromosomes. The number of chromosomes in a sex cell (sperm or ovum) of a human being is most likely to be :
(a) 46
(b) 23
(c) 21
(d) 42
Choose the correct answer from the four options given below :
In a human male, a sperm will contain :
What is heterogamety ? Explain the mechanism of sex determinatin in Drosophila.
In which livings, female decides the sex? Give two examples.
How is sex determined in human beings?
Which of the following combination of chromosome numbers represents the correct sex determination pattern in honey bees?
A woman has only daughters. Analyse the situation genetically and provide a suitable explanation.
The belief that the mother is completely responsible for the sex of the child is wrong because the child
Sex of an individual is determined by different factors in various species. Some animals rely entirely on the environmental ones, while in some other animals the individuals can change their sex during their life time indicating that sex of some species is not genetically determined. However in human beings, the sex of an individual is largely determined genetically.
- In what way are the sex chromosomes 'X' and 'Y' different in size? Name the mismatched pair of sex chromosome in humans.
- Write the number of pair/pairs of sex chromosomes present in human beings. In which one of the parent (male/female) perfect pair/pairs of sex chromosome are present?
- Citing two examples, justify the statement "Sex of an individual is not always determined genetically".
OR
Draw a flow chart to show that sex is determined genetically in human beings.
