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प्रश्न
Distinguish between heterogametic and homogametic sex determination systems.
उत्तर
| Heterogametic Sex | Homogametic Sex |
|
1. Organisms producing two different types of gametes. |
1. Organisms producing only one type of gametes. |
|
2. Example: Human male. |
2. Example: Human female. |
संबंधित प्रश्न
Write notes on sex determination in the unborn baby.
There are ................ pairs of chromosomes in the human being.
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?
Does the sex of the child depend on the father or it is just a matter of chance? Discuss.
With the help of a chart, explain the method of sex determination in honeybees.
In which livings, female decides the sex? Give two examples.
Write the functional activity of the following structure:
Heterosomes
Explain the mechanism of sex determination in humans with a suitable chart.
XO type of sex determination and XY type of sex determination are examples of ____________.
What is haplodiploidy?
Differentiate Intersexes from Supersexes.
Identify the female heterogamety from the chromosomal complements given below.
Which of the following is incorrect regarding ZW - ZZ type of sex determination?
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 ______
A woman has only daughters. Analyse the situation genetically and provide a suitable explanation.
Which pair of sex chromosome will determine a male?
The sex chromosome in a human ovum is ______.
A zygote which has Y chromosome inherited from the father will develop into a ______.
