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प्रश्न
Differentiate between male and female heterogamety.
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उत्तर
Male heterogamety: Male heterogamety includes human males having XY sex chromosomes and males of some insects, such as grasshopper and bugs, having XO sex chromosomes.
Female heterogamety: Female heterogamety includes females of some species of birds, fishes and insects. Females of butterfly and moth consist ZO sex chromosomes, while females of fish, reptiles and birds consist ZW sex chromosomes.
संबंधित प्रश्न
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
"The sex of a newborn child is a matter of chance and none of the parents may be considered responsible for it". Draw a flow chart showing determination of sex of a newborn to justify this statement.
How is the sex of the child determined in human beings?
Name the species used in sericulture. Name the stages in the life cycle of a silk moth in cyclic form.
The number of pair(s) of sex chromosomes in the zygote of humans is ______.
Which combination of genes in the zygote will produce children with brown eyes?
Choose the correct answer :
Human sex chromosomes are __________
Choose the correct answer:
Chromosomes identical in male and female are called __________
Answer the following question:
How is sex determined in human beings? Explain with the help of a diagram.
Differentiate Intersexes from Supersexes.
Read the following statements and select the correct option.
i. If sperm containing Y chromosome fertilizes the ovum, then diploid zygote is formed that grows into a male child.
ii. If sperm containing X chromosome fertilizes ovum, then diploid zygote is formed, that grows into a female child.
From the following which option correctly represents the normal genetic constitution of a ovum?
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 |
Diploid larvae which get royal jelly as food develops into ____________ and other develops into workers (sterile females).
Chromosomal constitution of normal human females can be written as ______.
Which of the following is incorrect regarding ZW - ZZ type of sex determination?
A trait in an organism is influenced by
The number of pair (s) of sex chromosomes in the zygote of humans is
Sex in honey bee is determined by ______.
Which pair of sex chromosome will determine a male?
