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Question
Complete the following sentence with appropriate word:
______are the alternative forms of a gene producing different effects.
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Solution
Alleles are the alternative forms of a gene producing different effects.
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RELATED QUESTIONS
Explain the mechanism of 'sex determination' in birds. How does it differ from that of human beings?
In a human, how many chromosmes are present in an egg which has just been produced by the ovary?
In a human, how many chromosmes are present in a fertilised egg?
A normal cell of human body contains 23 pairs of chromosomes. The number of chromosomes in a sex cell (sperm or ovum) of a human being is most likely to be :
(a) 46
(b) 23
(c) 21
(d) 42
The number of pair(s) of sex chromosomes in the zygote of humans is :
(a) one
(b) two
(c) three
(d) four
Which combination of genes in the zygote will produce children with blue eyes?
Explain the following terms:
Identical twins
From the following which option correctly represents the normal genetic constitution of a ovum?
Match the items of Column I with Column II:
| Column I | Column II | ||
| i. | XX-XO method of Sex Determination | a. | Turner syndrome |
| ii. | XX-XY method of Sex Determination | b. | Female heterog ametic |
| iii. | karyotype-45 | c. | Grasshopper |
| iv. | ZW-ZZ method of Sex Determination | d. | Female homogametic |
Does a male child inherit X chromosome from his father? Justify.
