Advertisements
Advertisements
Question
In a human, how many chromosmes are present in a fertilised egg?
Solution
A fertilised egg has 46 chromosomes.
APPEARS IN
RELATED QUESTIONS
In a human, how many chromosmes are present in a skin cell?
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?
Choose the correct answer from the four options given below :
In a human male, a sperm will contain :
Define the following:
Autosomes
Define the following:
Sex-linked characters
A zygote which has an X-chromosome inherited from the father will develop into a ______.
The number of pairs of sex chromosomes in the zygote of a human being is ______
A woman has only daughters. Analyse the situation genetically and provide a suitable explanation.
What is the probability of a girl or a boy being born into a family? Justify your answer.
What is sex determination? Explain the mechanism of sex determination in the case of birds.