Question

Which one is homogametic
a. Human Child
b. Human embryo
c. Human male
d. Human female

Answer 1

Homogametes are referred to as the organism that constitutes a similar type of gametes or chromosomes in them. They produce the same chromosome or sex cells in them. These are similar in their morphological structure. Heterogametes are an organism that is opposite to heterogametes and has dissimilar chromosomes.

Complete answer:

In the human female, there is a XX type of chromosome. It is present in germ cells. It shows that they belong to the same or similar type of gametes. Hence, they are homogametic. So option D is correct.

In the human male, there is a presence of the XY chromosome in germ cells. It possesses the dissimilar type of gonads. Hence, they are heterogametic. So, option C is incorrect.

In the human embryo, a released ovum from a human female and sperm from a human male fertilize together to form a diploid cell called zygote or embryo. So, option B is incorrect.

In a human child, chromosomes are not homogametic. So, option A is incorrect.
The gametes which are different in their shape, size, structure etc. are called heterogametes.
Sometimes they are also called Oogametes.

Hence, the correct answer is option (D).

Note: Hetero means different. When a male (with XY chromosomes) gives rise to gametes, there are 50% X-bearing sperms and 50% Y-bearing sperm {we call hetero gametes}, whereas, females have XX chromosomes, so, when they produce gametes, both may be similar (X-bearing egg) we call homo gametes. The Spermatozoa - it is a male gamete. It is a spiral, small in size and motile. The Ovum - is a female gamete. It is oval, large in size, and immovable. Hence, they are called heterogametes.