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Question
Which of the following is an example of ZW – ZZ type of mechanism of sex determination?
Options
Honeybee
Fish
Bird
Human being
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Solution
Bird
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RELATED QUESTIONS
Explain sex determination in human beings.
Differentiate between ‘ZZ’ and ‘XY’ type of sex-determination mechanisms.
How is the sex of the child determined in human beings?
In a human, how many chromosmes are present in a skin cell?
The human animal which has an XY pair of chromosomes is called :
(a) male
(b) hybrid
(c) female
(d) doomed
The two versions of a trait (character) which are brought in by the male and female gametes are situated on :
(a) copies of the same chromosome
(b) sex chromosomes
(c) two different chromosomes
(d) any chromosomes
Explain the following terms:
Identical twins
In XO type of sex determination ______.
All human chromosomes ate not paired. Most human chromosomes have a maternal and a paternal copy, and we have 22 such pairs. But one pair called the sex chromosomes, is odd in not always being a perfect pair. Women have a perfect pair of sex chromosomes. But men have a mismatched pair in which one is normal sized while the other is a short one.
(a) In humans, how many chromosomes are present in a Zygote and in each gamete?
(b) A few reptiles rely entirely on environmental cues for sex determination. Comment.
(c) "The sex of a child is a matter of chance and none of the parents are considered to be responsible for it." Justify it through flow chart only.
OR
(c) Why do all the gametes formed in human females have an X chromosome?
How is the sex of a newborn individual determined in different species of animals? Give three examples to support your answer.
