A diploid organism is heterozygous for 4 loci, how many types of gametes can be produced?
What is the meaning of loci and locus? please explain in detail.

Asked by  | 7th Jun, 2014, 01:39: PM

Expert Answer:

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 different gametes.
Each gene is heterozygous and there are four different genes so 2 to the 4th or a total of 16 different gametes will be produced.
A locus is a specific location of a DNA whereas loci (plural) refers to the locations of significant sequences on a chromosome which is an identification address for genes in the body similar to a street address on a map.

Answered by Sivanand Patnaik | 9th Jun, 2014, 08:32: AM

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