Question

the sex of a newborn individual in some species is largely determined genetically while in the other it is otherwise give three different example to justify this statement

Answer 1

(i) In some of the animals, sex determination is controlled by the environmental factors. 
(ii) In some reptiles, the temperature at which the fertilised egg is incubated before hatching, plays a role in sex determination of the offspring. 
For example: In a turtle, high incubation temperature leads to the development of female offsprings. Whereas in case of a lizard (Agama agama), high incubation temperature leads to the development of male offsprings. 
(iii) In case of some animals like snails, sex can be changed by individuals. It is not determined genetically.

Answer 2

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Explanation:

i) In some of the animals, sex determination is controlled by the environmental factors.

(ii) In some reptiles, the temperature at which the fertilised egg is incubated before hatching, plays a role in sex determination of the offspring.

For example: In a turtle, high incubation temperature leads to the development of female offsprings. Whereas in case of a lizard (Agama agama), high incubation temperature leads to the development of male offsprings.

(iii) In case of some animals like snails, sex can be changed by individuals. It is not determined genetically........

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