How many autosomal chromosomes are present in human cells? a. 23 pair b. 46 pair

Question

How many autosomal chromosomes are present in human cells? a. 23 pair b. 46 pair c. 22 pair d. 2 pair Circulating gonadal hormones (sex hormones) have a negative feedback effect on gonadotropins secreted by the anterior pituitary a. True b. False . The testis is primarily comprised of a. Leydig cells b. Interstitial cells c. Sertoli cells d. Seminiferous tubules . Sertoli cells which promote spermatogenesis in the seminiferous tubules are stimulated by while Leydig cells are stimulatedby. c. Testosterone LH d. FSH -Testosterone a. FSH - - LH are formed. c. Spermatids d. Spermatozoa . As a result of meiosis 1 in males a. Primary spermatocytes b. Secondary spermatocytes Page 5 of 6

Explanation / Answer

An 1 the correct answer is option b. There are 23 pair ofchromosome in human body 22 pairs of which are autosomal cromosome and the 23rd pair is the sex linked chromosome.

Answer 2. The correct option is option b i.e false. The circulating gonadal hormone have a positive feedback effect on gonadotropin secreated by posterior pituitary.

Answer 3. The correct option is option d. The testis are primarily composed of seminiferous tubule. The testis is having two types of cells called as interstial cells or mother cells or leydig cells the other type of cells called as sertoli cells which is composed of seminiferous tubule.

Answer. 4 the correct option is option b. I.e.sertoli cells promote the spermatogenesis in the seminiferous tubule are stimulated by testosterone while leydig cells are stimulated by leutinising hormone.

Answer. 5 The correct option is option a i.e ad a result of meiosis 1 in males primary spermatocyte is formed and after second meiotic division soermatids are formed

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