Class 12 Biology Principles of Inheritance and Variation: NCERT Solutions for Question 3
A diploid organism is heterozygous for 4 loci, how many types of gametes can be produced?
Locus is a fixed position on a chromosome, which is occupied by a single or more genes. Heterozygous organisms contain different alleles for an allelic pair. Hence, a diploid organism, which is heterozygous at four loci, will have four different contrasting characters at four different loci.
For example, if an organism is heterozygous at four loci with four characters, say Aa, Bb, Cc, Dd, then during meiosis, it will segregate to form 8 separate gametes.
If the genes are not linked, then the diploid organism will produce 16 different gametes. However, if the genes are linked, the gametes will reduce their number as the genes might be linked and the linked genes will be inherited together during the process of meiosis.
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9 Comment(s) on this Question
Thanks for help!!!
Formula for calculating no. of gametes is 2 to the power n, where n is no of the genes. Here heterozygous for four loci means, four diff genes as alleles for a gene are present on same locus on the homologois pair. So the answer is 2^4=16
I can't understand
I can't understand
Plz ask me how many types of gametes can be produced ??
So answer is 8 or 16? If 16 please explain I didnât understand
formula is 2^n.where n=no. of loci .therefore,2^4=16 types of gametes
If a diploid organism is homozygous for two loci then the gametes formed will be say A B C D respectively.Since it\'s a diploid organism the number of gametes will be 2Ãn. Therefore the number of gametes will be 2Ã4=8
I have a question ... If rwo loici are homozygous. .. thn vot will be the no. Of gametes produced...
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