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Question
With the help of a chart, explain the method of sex determination in honeybees.
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Solution
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
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RELATED QUESTIONS
Write the types of sex-determination mechanisms the following crosses show. Give an example of each type.
(i) Female XX with Male XO
(ii) Female ZW with Male ZZ
Differentiate between ‘ZZ’ and ‘XY’ type of sex-determination mechanisms.
There are ................ pairs of chromosomes in the human being.
What is male heterogamety?
Brief about female heterogamety.
From the following which option correctly represents the normal genetic constitution of a ovum?
In XO type of sex determination ______.
A zygote which has an X-chromosome inherited from the father will develop into a ______.
Which of the following statements is not true with respect to variation?
A zygote which has Y chromosome inherited from the father will develop into a ______.
