Navodaya Vidyalaya Samiti – Bhopal Region.
... *Spermatogenesis- The process of sperm formation takes place in seminiferous tubules of testis which is lined by germinal epithelial consisting immature male germ cells spermatogonia. Spermatogonia (2n) undergoes mitosis & increase in number.Some spermatogonia,called as primary spermatocyte undergoe ...
... *Spermatogenesis- The process of sperm formation takes place in seminiferous tubules of testis which is lined by germinal epithelial consisting immature male germ cells spermatogonia. Spermatogonia (2n) undergoes mitosis & increase in number.Some spermatogonia,called as primary spermatocyte undergoe ...
Sperm competition and sperm cooperation: the potential role of
... sperm of two or more different males for the fertilisation of a set of ova (Parker 1970, 1998). Based on this idea, researchers have investigated and confirmed the relationship between risk/intensity of sperm competition and ejaculate traits such as sperm number, sperm size and sperm motility both i ...
... sperm of two or more different males for the fertilisation of a set of ova (Parker 1970, 1998). Based on this idea, researchers have investigated and confirmed the relationship between risk/intensity of sperm competition and ejaculate traits such as sperm number, sperm size and sperm motility both i ...
197 THE ROLE OF Ca2+ IN SIGNAL TRANSDUCTION FOLLOWING
... concentration of free cytoplasmic Ca2+, [Ca 2+]i (for reviews, see Whitaker and Swann, 1993; Jaffe, 1991; Berger, 1992). This propagates from the site of sperm entry through the egg cytosol as a concentration wave. As we will discuss below, though elevation of [Ca2+]i is involved in fertilization in ...
... concentration of free cytoplasmic Ca2+, [Ca 2+]i (for reviews, see Whitaker and Swann, 1993; Jaffe, 1991; Berger, 1992). This propagates from the site of sperm entry through the egg cytosol as a concentration wave. As we will discuss below, though elevation of [Ca2+]i is involved in fertilization in ...
Carbohydrate-based interactions on the route of a spermatozoon to
... with the zona pellucida (ZP), the extracellular coat enveloping the oocyte. The ZP not only mediates the recognition between both gametes, but also regulates sperm functions, enabling the spermatozoon to complete fertilization. Capacitation is a prerequisite for the subsequent activation of the sper ...
... with the zona pellucida (ZP), the extracellular coat enveloping the oocyte. The ZP not only mediates the recognition between both gametes, but also regulates sperm functions, enabling the spermatozoon to complete fertilization. Capacitation is a prerequisite for the subsequent activation of the sper ...
The Program of and Mechanisms of Fertilization in the Echinoderm
... this case (Models, Fig. 4), entry is simply the assumption of a most probable thermodynamic configuration. A second mechanism could result from actin-like filaments in the sperm or egg interacting with cytoplasmic or cortical myosin of the egg or sperm, leading to contraction and resultant sperm ent ...
... this case (Models, Fig. 4), entry is simply the assumption of a most probable thermodynamic configuration. A second mechanism could result from actin-like filaments in the sperm or egg interacting with cytoplasmic or cortical myosin of the egg or sperm, leading to contraction and resultant sperm ent ...
Why do sperm carry RNA? Relatedness, conflict
... therefore, we tentatively suggest that this idea does not apply to RNAs that block translation (e.g., iRNA). Suppression of selfish interests: sperm–male conflict and control It is usually assumed that sperm are transcriptionally inactive and, therefore, that their phenotypes are determined by the d ...
... therefore, we tentatively suggest that this idea does not apply to RNAs that block translation (e.g., iRNA). Suppression of selfish interests: sperm–male conflict and control It is usually assumed that sperm are transcriptionally inactive and, therefore, that their phenotypes are determined by the d ...
The Life Cycle 12. - mt
... Ans. 1. The process of transfer of pollen grains from the anther to the stigma is called pollination. 2. If this transfer of pollen occurs in the same flower or another flower of the same plant, it is known as self pollination. 3. On the other hand, if pollen is transferred from one flower to the fl ...
... Ans. 1. The process of transfer of pollen grains from the anther to the stigma is called pollination. 2. If this transfer of pollen occurs in the same flower or another flower of the same plant, it is known as self pollination. 3. On the other hand, if pollen is transferred from one flower to the fl ...
BIO 105 Lab 6 CV Stress.2 Kunihiro ED
... o Shows the Correlation of Age and BMI in Females. The data proved that age negatively affects BMI. As females get older their BMIs increase. The trend line indicates that approximately for each additional year there is a 4-point increase in BMI. Attachment 3 o Shows the Males’ Heart Rate for Rest ...
... o Shows the Correlation of Age and BMI in Females. The data proved that age negatively affects BMI. As females get older their BMIs increase. The trend line indicates that approximately for each additional year there is a 4-point increase in BMI. Attachment 3 o Shows the Males’ Heart Rate for Rest ...
1 Biology 4361 Developmental Biology Fertilization October 19
... - extends microtubules and integrates them with egg microtubules to form an aster - microtubules extend throughout the egg and contact the female pronucleus - the two pronuclei migrate toward each other - fusion forms diploid zygote nucleus - DNA synthesis can begin either in the pronuclear stage (d ...
... - extends microtubules and integrates them with egg microtubules to form an aster - microtubules extend throughout the egg and contact the female pronucleus - the two pronuclei migrate toward each other - fusion forms diploid zygote nucleus - DNA synthesis can begin either in the pronuclear stage (d ...
A profile of fertilization in mammals
... proteins and spermadhesins), as well as several other sperm proteins (such as zonadhesin and sperm protein-56 (SP56)). In addition, results of recent experiments with homozygous-null mice have implicated two members of the ADAM (so-called because they contain a disintegrin and a metalloprotease doma ...
... proteins and spermadhesins), as well as several other sperm proteins (such as zonadhesin and sperm protein-56 (SP56)). In addition, results of recent experiments with homozygous-null mice have implicated two members of the ADAM (so-called because they contain a disintegrin and a metalloprotease doma ...
Animal Reproduction Management
... Unlike venereal diseases, infectious diseases can spread without sexual contact and can infect all animals in a herd at the same time. The results of infectious diseases include infertility, abortion, disrupted reproductive cycles, and other abrasive effects. ...
... Unlike venereal diseases, infectious diseases can spread without sexual contact and can infect all animals in a herd at the same time. The results of infectious diseases include infertility, abortion, disrupted reproductive cycles, and other abrasive effects. ...
Animal Science II #3
... • A. Reproductive diseases can be either venereal or infectious diseases. • 1. A venereal disease is transmitted sexually during the mating of animals. – The outbreak of venereal diseases can be quite large if they are spread by one male animal naturally mating with several female animals. – They ca ...
... • A. Reproductive diseases can be either venereal or infectious diseases. • 1. A venereal disease is transmitted sexually during the mating of animals. – The outbreak of venereal diseases can be quite large if they are spread by one male animal naturally mating with several female animals. – They ca ...
Reproductive Functions - health sciences at chs
... structures and promoting secondary sex characteristics ...
... structures and promoting secondary sex characteristics ...
Reproduction - Male
... Transmission of nutrients from dam to young. Transmission of wastes from young to dam. Protection of young from shock and adhesions by means of Amniotic Fluid. Prevention of bacteria and other large molecular substances from dam to young. The secretion of certain hormones; HCG (woman) and PMSG (mare ...
... Transmission of nutrients from dam to young. Transmission of wastes from young to dam. Protection of young from shock and adhesions by means of Amniotic Fluid. Prevention of bacteria and other large molecular substances from dam to young. The secretion of certain hormones; HCG (woman) and PMSG (mare ...
Fertilization - Formatted
... forms the time interval between shedding of gametes may be longer by weeks or months. The task of meeting sperm and egg is further intensified as they release their gametes into the open sea, where they are readily dispersed. For this reason, a large number of gametes may be produced to maintain a s ...
... forms the time interval between shedding of gametes may be longer by weeks or months. The task of meeting sperm and egg is further intensified as they release their gametes into the open sea, where they are readily dispersed. For this reason, a large number of gametes may be produced to maintain a s ...
STB 112 Theory - Unesco
... the body wall. This lengthens acquires blunt tentacles and a mouth, later hit constructs and detaches at the base to become an independent hydra. Budding may occur at any season, with adequate supply of food and water, it suitable normal condition. Sexual reproduction, this takes place during unfavo ...
... the body wall. This lengthens acquires blunt tentacles and a mouth, later hit constructs and detaches at the base to become an independent hydra. Budding may occur at any season, with adequate supply of food and water, it suitable normal condition. Sexual reproduction, this takes place during unfavo ...
Chapter-3-Ricci-3e
... Testosterone is needed to stimulate sexual desire in women. Thus, an evaluation of this level would be done. Progesterone is often called the hormone of pregnancy because of its calming effect (reduction in uterine contractions) on the uterus, allowing pregnancy to be maintained. Estrogen is the pre ...
... Testosterone is needed to stimulate sexual desire in women. Thus, an evaluation of this level would be done. Progesterone is often called the hormone of pregnancy because of its calming effect (reduction in uterine contractions) on the uterus, allowing pregnancy to be maintained. Estrogen is the pre ...
- Academy Test Bank
... Testosterone is needed to stimulate sexual desire in women. Thus, an evaluation of this level would be done. Progesterone is often called the hormone of pregnancy because of its calming effect (reduction in uterine contractions) on the uterus, allowing pregnancy to be maintained. Estrogen is the pre ...
... Testosterone is needed to stimulate sexual desire in women. Thus, an evaluation of this level would be done. Progesterone is often called the hormone of pregnancy because of its calming effect (reduction in uterine contractions) on the uterus, allowing pregnancy to be maintained. Estrogen is the pre ...
Ch. 46 Lecture 46_Lecture_2014
... higher fraction of zygotes • Internal fertilization is also often associated with mechanisms to provide protection of embryos and parental care of young ...
... higher fraction of zygotes • Internal fertilization is also often associated with mechanisms to provide protection of embryos and parental care of young ...
DEVELOPMENTAL BIOLOGY 5 FERTILIZATION
... surrounding unfertilized sea urchin eggs), agglutinated the sperm and activated their motility. The reaction was species specific. This factor called fertilizin came from the egg jelly coat. It slowly dissolved as in sea water. Fertilizin was later shown to be the constituent of both jelly coat and ...
... surrounding unfertilized sea urchin eggs), agglutinated the sperm and activated their motility. The reaction was species specific. This factor called fertilizin came from the egg jelly coat. It slowly dissolved as in sea water. Fertilizin was later shown to be the constituent of both jelly coat and ...
developmental biology 5 fertilization Introduction: Special features of
... surrounding unfertilized sea urchin eggs), agglutinated the sperm and activated their motility. The reaction was species specific. This factor called fertilizin came from the egg jelly coat. It slowly dissolved as in sea water. Fertilizin was later shown to be the constituent of both jelly coat and ...
... surrounding unfertilized sea urchin eggs), agglutinated the sperm and activated their motility. The reaction was species specific. This factor called fertilizin came from the egg jelly coat. It slowly dissolved as in sea water. Fertilizin was later shown to be the constituent of both jelly coat and ...
Document
... a sexual conflict over fertilization rate [20,28,29]. Models of sexual conflict predict that females will frequently win the co-evolutionary arms race with males [28] which is apparently the case in sexual conflict over fertilization rate in sticklebacks. It therefore appears that the females have a ...
... a sexual conflict over fertilization rate [20,28,29]. Models of sexual conflict predict that females will frequently win the co-evolutionary arms race with males [28] which is apparently the case in sexual conflict over fertilization rate in sticklebacks. It therefore appears that the females have a ...
Reproducton Development
... Sperm are made in the testes Stored in the epididymus Travels to the Vas Deferens Mix with semen(fluid) Seminal Vesicle Cowper’s Gland ...
... Sperm are made in the testes Stored in the epididymus Travels to the Vas Deferens Mix with semen(fluid) Seminal Vesicle Cowper’s Gland ...
Anisogamy
Anisogamy (noun) (also called heterogamy) refers to a form of sexual reproduction involving the union or fusion of two dissimilar gametes (differing either in size and/or form) — anisogamous, anisogamic, (adj.). The smaller gamete is considered to be male (sperm cell), whereas the larger gamete is regarded as female (egg cell).There are several types of anisogamy. Both gametes may be flagellated and thus motile. Alternatively, neither of the gametes may be flagellated. This situation occurs for example in some algae and plants. In the red alga Polysiphonia, large non-motile egg cells are fertilized by small, non-motile spermatia. In flowering plants, the gametes are non-motile cells within gametophytes.The form of heterogamy that occurs in animals, including humans, is oogamy. In oogamy, a large, non-motile egg cell (ovum) is fertilized by a small, motile sperm cell (spermatozoon). The large egg cell is optimized for longevity, whereas the small sperm cell is optimized for motility and speed. The size and resources of the egg cell allow for the production of pheromones, which attract the swimming sperm cells.