The black-headed python is a snake native to Australia, known, as its name suggests, for its black head.

The black caiman is a large crocodile that lives in freshwater areas of South America.

The black-backed jackal lives in the arid regions of Africa.

The Australian white ibis is well known for its distinctive appearance.

The Y chromosome carries the genes that determine maleness.

I inherited my X chromosome from my mother.

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She has trypophobia, and feels discomfort when she sees things with many holes like beehives or corals.

He experienced nantaimori for the first time.

Sex chromosomes play a crucial role in determining the sex of an organism.