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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.
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संबंधित प्रश्न
Explain sex determination in human beings.
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
Write notes on sex determination in the unborn baby.
A new born child has an XY pair of chromosmes. Will it be a baby boy or a baby girl?
Which of the following combinations of sex chromosomes produce a male child : XX or XY?
In a human, how many chromosmes are present in a brain cell?
In a human, how many chromosmes are present in a skin cell?
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
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?
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?
Define the following:
Sex-linked characters
Choose the correct answer:
Males have more chances of suffering from sex-linked disease because of ___________
Write a short note on sex determination in man.
Give Technical Term:
The cell which determines the sex of a baby.
Explain the haplo-diploid method of sex determination in the honey bee.
Brief about female heterogamety.
How is sex determined in human beings?
Match the items of Column I with Column II:
| Column I | Column II | ||
| i. | XX-XO method of Sex Determination | a. | Turner syndrome |
| ii. | XX-XY method of Sex Determination | b. | Female heterog ametic |
| iii. | karyotype-45 | c. | Grasshopper |
| iv. | ZW-ZZ method of Sex Determination | d. | Female homogametic |
Number of autosomes present in liver cells of a human female is ______.
Which of the following combination of chromosome numbers represents the correct sex determination pattern in honey bees?
A zygote which has an X-chromosome inherited from the father will develop into a ______.
The maleness of a child is determined by ______
Which of the following determines the sex of a child?
A trait in an organism is influenced by
Some dinosaurs had feathers although they could not fly but birds have feathers that help them to fly. In the context of evolution this means that
Structures present in a cell which is responsible for determination of the sex of a baby is ______.
Which pair of sex chromosome will determine a male?
