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प्रश्न
With the help of a chart, explain the method of sex determination in honeybees.
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उत्तर
In the honeybee, the haplodiploid sex-determination system determines the sex of the offspring. In this system, sex is determined by the number of sets of chromosomes an individual receives. An offspring developed from fertilized egg develops as a female and unfertilized egg develops in males. A female offspring shows diploid (2n = 32) number of chromosomes. Males (drones) produced by means of parthenogenesis have haploid (n = 16) number of chromosomes
SEX DETERMINATION
APPEARS IN
संबंधित प्रश्न
Answer the following questions related to sex determination in human beings:
i. What is sex chromosome?
ii. How many pairs of chromosomes are present in human beings?
iii. How is the sex of the human offspring determined?
iv. Draw a diagram depicting sex determination in man.
Which combination of genes in the zygote will produce children with blue eyes?
The person A has only B chromosomes in all its gametes. On the other hand, another person C has chromosome D in half of gametes and chromosome E in the other half of gametes. When chromosomes B and D combine during fertilisation, a female zygote results. On the other hand, combination of B and E chromosomes produces a male zygote.
(a) What are chromosomes (i) B (ii) D, and (iii) E?
(b) Out of B, D and E, which two chromosomes are of the same type?
(c) Which chromosome is smaller in size?
(d) What is the general name of chromosomes such as B and E?
(e) Out of the two persons A and C, which one is (i) male, and (ii) female?
Name any two genetic in humans.
Define the following:
Sex chromosomes
Diploid larvae which get royal jelly as food develops into ____________ and other develops into workers (sterile females).
Which of the following is incorrect regarding ZW - ZZ type of sex determination?
Which of the following combination of chromosome numbers represents the correct sex determination pattern in honey bees?
Which of the following is an example of genetic variation?
What is the probability of a girl or a boy being born into a family? Justify your answer.
