.At the end of spermatogenesis each primary spermatocyte gives rise to
1.Only one spermatid
2.Two spermatids
3.Three spermatids
4.Four spermatids
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.Chromosomal reduction during gametogenesis occurs due to the
1.Meiosis
2.Mitosis
3.Non-disjunction
4.Amitosis
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.In Rana pipens the period of growth in oogenesis takes about
1.One year
2.Two year
3.Three year
4.Four year
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.Name the special cells which provide nutrient materials to the matured spermatozoa in the testis
1.Spermatogonia
2.Leydig�s cells
3.Interstitial cells
4.Sertoli cells
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.Sertoli cells are otherwise called
1.Plasma cells
2.Nurse cells
3.Germinal cells
4.Parietal cells
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A complicated process of growth and change converts the spermatid into a
1.Spermatogonia
2.Primary spermatocyte
3.Secondary spermatocyte
4.Function sperm
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Acrosome of sperm is formed by
1.Mitochondria
2.Centriole
3.Golgi bodies
4.Nucleus
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Each centriole in the mature sperm consists of
1.2 central and 9 peripheral fibrils
2.3 central and 6 peripheral fibrils
3.4 central and 5 peripheral fibrils
4.9 central and 2 peripheral fibrils
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Embryology is
1.The study of development of sex cells
2.The study of development of sex organs
3.The study of an individual from the fertilized egg
4.The study of development of plant
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First polar body is formed from
1.Primordial germ cells
2.Oogonia
3.Primary oocyte
4.Secondary oocyte
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From a primary Oocyte
1.One egg is produced
2.Three eggs are produced
3.Four eggs are produced
4.Two eggs are produced
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Gametogenesis is the formation of
1.Gonads
2.Ova
3.Sperms
4.Gametes
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How many ootids are formed in oogenesis
1.Only one
2.Two
3.Three
4.Four
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Lipovitellin is a
1.Lipids
2.Carbohydrates
3.Minerals
4.Proteinaceous substance
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Phosphovitellin and Lipovitellin in the egg yolk are
1.Carbohydrates
2.Lipids
3.Vitamins
4.Proteins
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Spermatozoa get their nourishment from the
1.Nucleus
2.Cytoplasm
3.Sertoli cells
4.Ciliated Epithelium
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Testis is made up of sperm tubules called
1.Malpighian tubules
2.Uriniferous tubules
3.Seminiferous tubules
4.Collecting Seminiferous tubules
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The acrosome is formed from
1.Nucleus
2.Golgi bodies
3.Centrosome
4.Mitochondria
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The cytoplasm surrounding the mitochondria found in the middle piece of the sperm is called
1.Acrosome
2.Centrosome
3.Microsome
4.Manchette
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The function of Sertoli cells is
1.To secrete hormones
2.To help in ejaculation
3.To develop sperms
4.To provide nutrition to developing spermatozoa in the testis
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The length of frog�s sperm ranges about
1.0.01 - 0.02 mm
2.0.01 - 0.03 mm
3.0.02 - 0.03 mm
4.0.03 - 0.04 mm
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The lysine secreted by the acrosome helps in the
1.Activation of sperm
2.Penetration of sperm
3.Clumping of sperm
4.Fertilization of sperm
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The process of transformation of a spermatid into a spermatozoan is called as
1.Spermatogenesis
2.Gametogenesis
3.Spermiogenesis
4.Sperm maturation
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The size of the mature egg ranges from
1.1000 - 2000 �
2.1500 - 2000 �
3.2000 - 2500 �
4.2000 - 3000 �
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The term gametogenesis means the
1.Formation of ovary
2.Formation of testis
3.Formation of gametes
4.Formation of embryo
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The unspecialized germ cells found in the seminiferous tubules are called
1.Primary spermatocytes
2.Secondary spermatocytes
3.Spermatogonia
4.Primordial germ cells
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Which are called sperm mother cells
1.Spermatids
2.Spermatogonia
3.Spermatocytes
4.SPrimordial germ cells
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Which of the following undergoes differentiation process
1.Spermatogonia
2.Primary spermatocyte
3.Secondary spermatocyte
4.Spermatids
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Which one of the following undergo meiotic division
1.Primordial germ cells
2.Spermatogonia
3.Primary spermatocytes
4.Spermatids
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Which part of sperm secretes lysine
1.Nucleus
2.Acrosome
3.Middle piece
4.Tail
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