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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
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उत्तर
(i) The type of sex determination mechanism shown in female XX with male XO is male heterogamety.
Example- Humans
(ii) The type of sex determination mechanism shown in female ZW with male ZZ is female heterogamety.
Example- Birds
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संबंधित प्रश्न
Fill in the following blank with suitable word :
Genes always work in ................ .
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 chromosomes
Grasshopper is an example of XO type of sex determination in which the males have ______.
In XO type of sex determination ______.
Which of the following determines the sex of a child?
Select the incorrect statement
The chromosomal constitution of a human female can be written as ______
Does a male child inherit X chromosome from his father? Justify.
