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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
Explain how, sex is determined in human babies.
In a human, how many chromosmes are present in an egg which has just been produced by the ovary?
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?
Drone of the honeybees shows haploid number of chromosomes. Illustrate.
Which of the following organisms has haploid number of chromosomes?
ZZ/ZW type of sex determination is seen in ______.
Which of the following decides the sex of the child?
Structures present in a cell which is responsible for determination of the sex of a baby is ______.
How many types of gametes are produced by a human female?
Which pair of organisms would NOT be expected to share the same sex determination system?
