Why does sexual reproduction increase the genetic variation in a species?
a. a fertilized egg has a mixture of alleles from the two parents.
b, sexual reproduction doubles the chromosome number
c. the gametes in sexual reproduction are exact clones of the parents.
d. sexual reproduction produces organisms with no dna.

A. A fertilized egg has a mixture of alleles from the two parents.

Sexual reproduction is a method of production of new organism by the fusion of gametes formed by two distinct parents. A single sperm fuses with the egg. The genes of the two parents combines in this process. During the gamete formation a pair of allele gets segregated from each parent and a single copy of allele is obtained from each parent. Therefore, a fertilized egg contains a mixture of alleles obtained from both parents this is the result of genetic variations in a species. The offspring is not exactly identical to either of the parents but exhibit genetic variations.

tsd is temerature dependent sex determination.

tsd: it is a type of environmental sex determination in which the temperature experienced during embryonic/ larval development (ambient temperature for development) determine the sex of the offspring.

crocodile displays the tsd where the ambient temperature of the developing egg determines the individual's sex. for example in the american alligator's eggs, incubation at 33 ºc produces mostly males, while incubation at 30 ºc produces mostly females. so if the american alligator's egg will get the ambient temperature (33 degree celcius)during embryonic development from egg, the offspring will be male and same for the female sex determination.

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