reproductive systems are shown in the video‚ and there is so much to explore and absorb. I followed the short journey of millions of sperm as they develop and strive mightily to reach the egg. And I noticed that there isn’t a guy in the room who can watch footage without squirming! Likewise‚ magnification of up to half a million times the actual size allowed me to see the egg from its development in an ovary‚ through the delicate fallopian tube for fertilization‚ and on to the uterus for growth and eventual
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EMBRYOLOGY DEVELOPMENT * Sequential expression of the genes * Organisms proceeds from cell fertilized egg to adulthood to eventual death Successful development * Has to follow the prescribe sequence in normal pattern Three Fundamental Processes in Embryology: 1. Morphogenesis * (morph- = shape‚ + genesis = origin) * Origin of shape‚ form 2. Differentiation * Process of cells becoming different‚ and specializing for different functions 3. Growth
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“The cells in your body are tiny-a row of about forty would fit into 1mm. But although they are too small to see with the naked eye their complexity is remarkable. A single cell can be thought of as an organised chemical system‚ separated from its disorganised surroundings by a membrane” (Boyle et al 1999) First here is a brief summary of major eukaryotic organelles and their structures. The nucleus is the largest and most prominent organelle in the cell. It is usually spherical and about 10um in
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and female reproductive systems have to be different. Each system has different parts‚ problems and care. Each system have different purposes‚ the male reproductive system’s function is to produce sperm‚ while the female reproductive system’s function is to produce ova‚ store ova and house a fertilized egg. The male reproductive system is divided into two categories: internal and external reproductive organs. External organs are outside the body and internal organs are inside the body. The external
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Carrillo 1 The Life Cycle of a Sea Star Between birth and death‚ a sea stars life follows a cycle of development‚ adulthood‚ and eventually parenthood. It is the cycle that produces new sea stars and keeps populations balance. Sea stars begin their lives as tiny larvae that look nothing like the adult sea stars. The larvae have different shaped bodies with many projecting arms. “It looks more like a blob of jelly” (Perry 46). Sea star larvae develop in open water and immediately become
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A Bio 101 refresher: women are born with about 1-2 million eggs‚ but over a life time only release 300 to 400 through ovulation. Usually a woman releases just one egg each month. The egg travels down a fallopian tube‚ one of the two tubes that connect her ovaries to her uterus. If the timing is right‚ a sperm may fertilize it on its way to the uterus. If fertilization doesn’t happen within 24 hours of the egg leaving the ovary‚ the egg it moves through the uterus and disintegrates. But wait‚ that’s
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Genetic Engineering INTRODUCTION Genetic Engineering Involves methods‚ techniques‚ and procedures used in gene manipulation. Furthermore‚ it Involves isolation‚ manipulation and reintroduction of DNA into cells or model organisms‚ usually to express a protein to reach desired effects. Aim: to introduce new characteristics or attributes physiologically or physically Such as: making a crop resistant to herbicide‚ introducing a novel trait‚ enhancing existing ones‚ or producing a new protein
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continues to be widely used for biological research in studies of genetics‚ physiology‚ microbial pathogenesis and life history evolution. It is typically used because it is an animal species that is easy to care for‚ breeds quickly‚ and lays many eggs. Flies belonging to the family Tephritidae are also called fruit flies‚ which can lead to confusion‚ especially in Australia and South Africa‚ where the term fruit fly refers to members of the Tephritidae that are economic pests in fruit production
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non-disjunction of chromosome‚ a failure of chromosomes to separate properly during cell division. It emphasizes particularly on how the reproductive cells or gametes is created during reproduction. The gametes of women are eggs and of men are sperms. When the egg and the sperm combine during fertilization at conception‚ they create a normal offspring with the proper number of chromosomes of 46. Nondisjunction occurs when these chromosome fail to segregate and can cause common abnormality of having
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association). Conception and pregnancy are complex methods that depend on a number of factors‚ including: 1) the creation of healthy sperm by the male‚ 2) healthy eggs created by the female; 3) unclogged fallopian tubes that let the sperm get to the egg; 4) the capability of the sperm to fertilize the egg when they meet up; 5) the capability of the fertilized egg to become set in the female ’s uterus; and‚ 6) adequate embryo quality. This paper is going to look at the long-term impact of infertility
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