Selection has favored large body size in male kangaroos because larger male kangaroos are better able...

Selection has favored large body size in male kangaroos because larger male kangaroos are better able to access females than smaller males. What type of selection is this?

Group of answer choices

Intrasexual

Both C & D

Stabilizing

Natural

Intersexual

Expert Solution

ANSWER - Intrasexual selection.

Sexual selection, a kind of natural selection where one sex prefers a specific characteristic in an individual of the other sex. Acording to darwin, sexual selection pattern operates only on one of the two sex that is largely on male (for example colorful and long feather in peacock, such ornamental haracter attracts the female for mating), similarly in kangroos with big arm and shoulder muscles also attract female. Pattern of forlimb musculature in male kangaroos plays an improtant role in the attract of the female kangaroos and mating occurs. Scuh type of selection for mating in kangaroos is known as intrasexual selection.

Intrasexual selection occurs within the same sex mbembers where competeison occurs between males in common. The trait body size in kangaroos is to potential sexual pattern.

[Note- Sexual selection is associated with reproduction while Natural selection concern survival and reproduction.]

Explanation of incorrect options -

Stablizing selection - Such selection pressure select the avarage value of the characters not the extreme values in the population by favouring the avarage individuals and the population remain more or less genetically constant that is the mutaion and variation are not favoured. For example hight, body weight, weight of baby during birth, etc.

Interselection - Intersexual selection occurs between the sex. It is the result of interections of females and males of a species.

Natural selection: Natural selection represent different survival and reproduction of the individuals of different phenotype.

gladiator answered 1 year ago

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