Gamete Production and Reproductive Organs Worksheet

Compare with mitosis (similarities/differences).

• Both mitosis and meiosis involve cell division, but mitosis produces identical cells while meiosis produces genetically different cells.

• Mitosis and meiosis are completely unrelated processes.

• Mitosis results in four daughter cells, while meiosis results in two.

• Mitosis only occurs in animals, while meiosis only occurs in plants.

Answer explanation

Both mitosis and meiosis are forms of cell division. However, mitosis results in two identical daughter cells, while meiosis produces four genetically diverse cells, highlighting their key differences.

The genetic aspect of meiosis is:

• It increases genetic variation through recombination and independent assortment.

• It produces identical daughter cells.

• It reduces the chromosome number to diploid.

• It prevents genetic diversity.

Answer explanation

The correct choice highlights that meiosis increases genetic variation through recombination and independent assortment, which are key processes that shuffle genetic material, unlike the other options that misrepresent meiosis.

Which structure contains 2-300 per teste?

• Lobule

• Seminiferous tubule

• Leydig cell

• Sertoli cell

Answer explanation

The lobule is the structure in the testes that contains 2-300 seminiferous tubules, where sperm production occurs. This makes it the correct answer, as the other options do not contain this specific number.

Which cells trigger testosterone secretion?

• Leydig cells

• Sertoli cells

• Spermatogonia

• Spermatocyte

Answer explanation

Leydig cells are responsible for producing testosterone in the testes. They respond to luteinizing hormone (LH) and are crucial for male reproductive function, unlike Sertoli cells, spermatogonia, and spermatocytes.

Fill in the blank: Sertoli cells trigger activation to support spermatogonia and secrete _______.

• inhibin & ABP

• testosterone

• FSH

• LH

Answer explanation

Sertoli cells support spermatogonia by secreting inhibin and androgen-binding protein (ABP), which are crucial for regulating spermatogenesis and maintaining testosterone levels.

Which hormone triggers spermatogenesis in seminiferous tubules?

• FSH

• LH

• Testosterone

• Inhibin

Answer explanation

FSH (Follicle-Stimulating Hormone) stimulates the Sertoli cells in the seminiferous tubules, promoting spermatogenesis. While LH and testosterone are important for overall male reproductive function, FSH is the key hormone for initiating sperm production.

What is the ploidy of spermatogonia?

• Haploid

• Diploid

• Triploid

• Tetraploid

Answer explanation

Spermatogonia are the germ cells in the male reproductive system that undergo mitosis to produce sperm. They are diploid (2n), meaning they contain two sets of chromosomes, one from each parent.

What is the ploidy of spermatid?

• Haploid

• Diploid

• Triploid

• Tetraploid

Answer explanation

Spermatids are the result of meiosis in spermatogenesis, where diploid spermatogonia undergo two rounds of division to produce haploid cells. Therefore, the correct ploidy of spermatids is haploid.

Fill in the blank: Spermatozoan is a _______ mature haploid gamete.

• mature haploid gamete

• immature diploid cell

• zygote

• somatic cell

Answer explanation

Spermatozoan refers to a mature haploid gamete, specifically the male gamete in sexual reproduction. It is not an immature diploid cell, zygote, or somatic cell, making 'mature haploid gamete' the correct choice.

Which hormone triggers FSH & LH release from anterior pituitary?

• GnRH

• Testosterone

• Inhibin

• ABP

Answer explanation

GnRH (Gonadotropin-releasing hormone) is the hormone that stimulates the anterior pituitary to release FSH (Follicle-stimulating hormone) and LH (Luteinizing hormone), making it the correct answer.