Question

"The sex of a newborn individual in some species is largely determined genetically, while in others it is otherwise" Give three different examples to justify this statement.​

Answer 1

There are some other modes (non-genetic) of sex determination in some species. Example:

In some species of reptiles (such as alligators, turtles etc.), the sex-determination is temperature dependent. The temperature at which the egg is incubated during the temperature-sensitive period determines the sex of the baby.

In some species such, sex reversal occurs wherein the sex of the developing organism changes when they hatch out or develops into adults.

In some marine worms, the sex is determined by the physical contact between the larvae and female. If they mate with the female, they will become a male whereas if they do not mate, they will grow into females.

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Answer 2

☺⭐Here is your answers⭐☺

(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.

⭐SOME METHODS OF SEX DETERMINING IN NATURE:

⭐Environmental cue:

In some animals, the temperature at which fertilised eggs are kept determines whether the developing animal in egg is male or female.
In some animals like snail, individual can change sex.

⭐Genetical cue:

A child who inherits an X chromosome from the father will be a girl and one who inherits a Y chromosome from the father will be a boy.

☺⭐hope it helps u⭐☺