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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
Explain the mechanism of sex determination in birds.
Does genetic combination of mother play a significant role in determining the sex of a new born baby?
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
Name any two genetic in humans.
Define the following:
Autosomes
Choose the correct answer:
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In which livings, female decides the sex? Give two examples.
Write a short note on sex determination in man.
Short Answer Question.
“Father is responsible for determination of sex of child and not the mother”. Justify.
Explain the haplo-diploid method of sex determination in the honey bee.
ZZ/ZW type of sex determination is seen in ______.
Human offspring’s sex is determined ______
The maleness of a child is determined by ______
A zygote which has an X-chromosome inherited from the father will develop into a
Select the statements that describe characteristics of genes
- genes are specific sequence of bases in a DNA molecule
- a gene does not code for proteins
- in individuals of a given species, a specific gene is located on a particular chromosome
- each chromosome has only one gene
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
How many types of gametes are produced by a human female?
Which of the following group shows ZW-ZZ type of sex determination?
Given below are two statements:
Statement - I: The male Drosophila has a pair of homomorphic sex chromosomes.
Statement - II: The male human being has a pair of heteromorphic sex chromosomes.
In the light of above statements, Choose the most appropriate answer from the options given below:
