Question

Gonads/ testes develop from embryonic
A. Ectoderm
B. Endoderm
C. Mesoderm
D. Both mesoderm and endoderm

Answer 1

Hint: The gonads exist in both men and women. The testes, often known as testicles, are the male sex glands that are part of the male reproductive system in males. They are housed in a pouch of skin called the scrotum, which is positioned behind the penis. The ovaries, or female gonads, are a pair of reproductive glands in the female body. They have two functions: they generate eggs and female hormones and are positioned in the pelvis, one on each side of the uterus.

Complete answer :
Option A Ectoderm : One of the three basic germ layers formed in early embryonic development is the ectoderm. Epithelial and neural tissues arise from the ectoderm (spinal cord, peripheral nerves and brain). The skin, mouth linings, anus, nose, sweat glands, hair and nails, and tooth enamel are all included. Gonads/testes do not develop from ectoderm. Hence option A is not correct.
Option B Endoderm : In the very early embryo, endoderm is the innermost of the three basic germ layers. The endoderm is made up of flattened cells that eventually become columnar. It is the epithelial lining of a variety of systems. Gonads/testes do not develop from endoderm. Hence option B is not correct.
Option C Mesoderm : In the very early embryo, the mesoderm is one of three basic germ layers. Mesenchyme, mesothelium, non-epithelial blood cells, and coelomocytes are all formed in the mesoderm. Coeloms are lined by mesothelium. Mesoderm is responsible for the formation of muscles, septa (crosswise partitions), and mesenteries (lengthwise partitions), as well as being a component of the gonads (the rest being the gametes). Gonads or testes develop from embryonic mesoderm. Hence option C is the correct answer.
Option D Both mesoderm and endoderm : Since only mesoderm develops into gonads or testes and not endoderm, option D is not correct.

Therefore, option C. Mesoderm the correct answer.

Note :
Gastrulation is the process by which mesoderm develops. The paraxial mesoderm, intermediate mesoderm, and lateral plate mesoderm are the three most critical components. The somitomeres are formed by the paraxial mesoderm, which give rise to the head's mesenchyme and organize into somites in the occipital and caudal segments, as well as sclerotomes (cartilage and bone) and dermatomes.