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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
Name two animals which have nineteen pairs of chromosomes.
Name any two genetic in humans.
________ shows haplo-diploid type of sex-determination.
What is heterogamety ? Explain the mechanism of sex determinatin in Drosophila.
Define the following:
Autosomes
Choose the correct answer :
Human sex chromosomes are __________
Choose the correct answer:
Males have more chances of suffering from sex-linked disease because of ___________
Choose the correct answer:
A single recessive trait, able to express must be on _________
Write the functional activity of the following structure:
Heterosomes
How drones are produced in honey bees?
How is sex determined in human beings?
How many ovum are formed when a diploid cell undergoes meiosis, during oogenesis?
There are five daughters and no son in a family. It is because
Number of autosomes present in liver cells of a human female is ______.
If a normal cell of the human body contains 46 pairs of chromosomes then the numbers of chromosomes in a sex cell of a human being is most likely to be ______
How many types of gametes are produced by a human female?
A zygote which has Y chromosome inherited from the father will develop into a ______.
An organism that possesses both male and female reproductive organs in the same individual is classified as which type?
