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प्रश्न
ZZ/ZW type of sex determination is seen in ______.
विकल्प
Peacock
Cockroach
Platypus
Snails
apple snail
human
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उत्तर
ZZ/ZW type of sex determination is seen in peacock.
Explanation:
The ZZ/ZW type of sex determination is seen in birds, many fishes, and reptiles. In this system, the female is heterogametic (ZW), meaning she produces two types of eggs,one with the Z chromosome and one with the W chromosome. The male is homogametic (ZZ), producing only one type of sperm with the Z chromosome.
APPEARS IN
संबंधित प्रश्न
Explain the mechanism of sex determination in birds.
Write notes on sex determination in the unborn baby.
Fill in the following blank with suitable word :
Genes always work in ................ .
In a human, how many chromosmes are present in a fertilised egg?
A normal cell of human body contains 23 pairs of chromosomes. The number of chromosomes in a sex cell (sperm or ovum) of a human being is most likely to be :
(a) 46
(b) 23
(c) 21
(d) 42
The number of pair(s) of sex chromosomes in the zygote of humans is :
(a) one
(b) two
(c) three
(d) four
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
The sex of a child is determined by which of the following?
(a) the length of the mother's pregnancy
(b) the length of time between ovulation and copulation
(c) the presence of and X chromosome in an ovum
(d) the presence of a Y chromosome in a sperm
Which combination of genes in the zygote will produce children with brown eyes?
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?
Why did T. H. Morgan select Drosophila melanogaster to study sex linked genes for his lab experiments ?
Choose the correct answer:
Chromosomes identical in male and female are called __________
Write a short note on sex determination in man.
Complete the following sentence with appropriate word:
______are the alternative forms of a gene producing different effects.
XO type of sex determination and XY type of sex determination are examples of ____________.
Brief about female heterogamety.
How many ovum are formed when a diploid cell undergoes meiosis, during oogenesis?
From the following which option correctly represents the normal genetic constitution of a ovum?
The ‘X’ body of Henking was observed in ______.
In XO type of sex determination ______.
Which of the following determines the sex of a child?
The maleness of a child is determined by
Which of the following statements is not true with respect to variation?
Also describe as to, who determines the sex of an unborn child? Mention whether temperature has a role in sex determination.
Does a male child inherit X chromosome from his father? Justify.
What is sex determination? Explain the mechanism of sex determination in the case of birds.
The sex chromosome in a human ovum is ______.
