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प्रश्न
Which of the following is incorrect regarding ZW-ZZ type of sex determination?
विकल्प
It occurs in birds and some reptiles
Females are homogametic and males are heterogametic
Male produce two types of gametes
It occurs in gypsy moth
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उत्तर
Females are homogametic and males are heterogametic
संबंधित प्रश्न
If a normal human cell has 46 chromosomes, how many chromosomes will be there in a human (i) sperm cell, and (ii) zygote?
A family consists of two parents and their five children and the pedigree chart below shows the inheritance of the trait colour blindness in them.
Who is colour blind in the parents – the Father or the Mother?
Choose the correct answer:
A man can transfer his sex-linked gene to his ______________
Complete the following sentence with appropriate word:
___________ chromosomes do not take part in sex determination.
Identify the organism in which ZZ-ZW type of sex determination is observed.
Sex is determined in human beings ______.
In XO type of sex determination ______.
The number of pairs of sex chromosomes in the zygote of a human being is ______
The number of pair (s) of sex chromosomes in the zygote of humans is
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?
