SOME CASES OF SEXUAL DIMORPHISM

UNIT

4The reproduction function

Natural Science 2. Secondary Education

Some cases of sexual dimorphism

• In certain species of animals, the two sexes differ only in their sexual organs. This means that they do not exhibit sexual dimorphism.

• Examples are rabbits, cats, transparent gobies, etc.

Animals that do not display sexual dimorphism

Female cat Male cat

Male transparent goby

Female transparent goby

UNIT

4

Natural Science 2. Secondary Education

• In other species, in addition to having different reproductive organs, females and males are very different in their appearance: these species exhibit sexual dimorphism.

• Examples of species that display sexual dimorphism are lizards, lions, many birds, human beings, etc.

Sexual dimorphism

Male teal

Female teal Male lizard

Female lizard

Some cases of sexual dimorphismUNIT

4

Natural Science 2. Secondary Education

Sexual dimorphism

Male deer

Female deer

Male pheasant

Female pheasant

Female blackbird

Male blackbird

Some cases of sexual dimorphismUNIT

4

Natural Science 2. Secondary Education