Question

____________ genes are those which decide the appearance of an organism only in the presence of another identical gene.

Answer 1

The gene which can decide the appearance of an organism only in the presence of another identical gene is called as recessive gene. A recessive gene is a gene that is not dominant but only manifests when a gene of both parents is the same, i.e., homozygous (where both genes are the same as in two genes for blue eyes).

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Answer 2

☯ AnSwEr :

Ressive genes are those which decide the appearance of an organism only in the presence of another identical gene.

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★ Additional Information :

There are 46 chromosomes inside human body. Out of which 23 chromosomes are transffered to the offsprings by male and female both. Out of these 23 chromosome 1 is sex chromosome. So, there will be total 46 chromosome and 2 sex chromosomes because male and female both gave 23 chromosomes. Sex chromosome of the female is always X and sex chromosome of male can be X and Y respectively. If male chromosome is Y then it is a boy and if male chromosome is X then it is girl. XY → Boy and XX → Girl.