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प्रश्न
Explain the following terms:
Identical twins
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उत्तर
Identical twins - A single fertilized egg or Zygote splits into two parts after conception, resulting in the development of two individual embryos which later develop into indentical twins.
संबंधित प्रश्न
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
A zygote which has inherited an X chromosome from the father will develop into :
(a) baby boy
(b) baby girl
(c) adult
(d) either boy or girl
Choose the correct answer:
A man can transfer his sex-linked gene to his ______________
With the help of a chart, explain the method of sex determination in honeybees.
Complete the following sentence with appropriate word:
______are the alternative forms of a gene producing different effects.
Which of the following is incorrect regarding ZW-ZZ type of sex determination?
Grasshopper is an example of XO type of sex determination in which the males have ______.
Which of the following determines the sex of a child?
Does a male child inherit X chromosome from his father? Justify.
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?
