Merit & Distinction answers – Access biological systems 1- A) The egg and sperm cells, they have only 23 chromosomes each. A sperm from man combine with women’s egg in her womb to make a zygote. The zygote ends up with total of 46 chromosomes and can now grow in to a baby so sperm and eggs end up with DNA and they get that through a process called CELL DIVISION, which happens when cells, normally make new copies of themselves and each cells ends up with 46 chromosomes. However in cell
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Ectopic Pregnancy Answer the following questions 1. How is a vasectomy performed? Be sure to cite the specific anatomical structures involved. How does this prevent pregnancy? |A vasectomy is procedure used to prevent a man from ejaculating sperm. There are two methods for performing this procedure. The | |conventional vasectomy uses one or more small incisions in the scrotum used to access the vas deferens. They take a small section | |out of both vas deferens and either tie or carterize
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The male and female reproductive systems become active after puberty. The male system starts with the creation of sperm in the testicles. Sperm carries the chromosomes that make up half of the genetics of the embryo created. The male body creates an endless supply of sperm that will travel from the testicles through the vas deferens to the penis where it is then ejaculated into the female reproductive system. This is the end of the male involvement with reproduction. The female body starts the
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make copies of themselves during cell division or when the cell reproduces, usually the DNA molecules contains two identical molecules that were produced from one single parent molecule. When fertilizing an egg cell with a sperm cell, the sperm gives DNA to the fertilized egg and the egg has its DNA already , as we know
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B5: Sex Prediction and Selection SEX PREDICTION Sex prediction also termed as “prenatal sex discernment”. It is the prenatal testing for discerning the sex of a fetus before birth. A sex prediction test is a test done on or by pregnant women to determine the sex of babies. Methods: * Maternal Blood Sample to analyze the small amount of fetal DNA that can be found within, it provides the earliest post-implantation test. * Chorionic Villus Sampling (CVS) and Amniocentesis are two rather
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000 new sperm every second. Each sperm is one of a kind. When you reproduce, you get 23 chromosomes from the mom and 23 chromosomes from the dad. An unborn child carries genes from their ancestors. This is why you have children who have characteristics of their ancestors. A woman begins creating eggs as a fetus in her mother’s womb. The eggs begin to die, but that is okay. In ovaries, it’s quality not quantity that counts. Every month, one of a woman’s two ovaries selects an immature egg cell to
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regularly as possible, sperm cells will be produced in millions and the fact that one sperm cell can fertilize an egg, is an indicator that you can make love to your partner as often as you please. In fact, the more sex you have equals better chances of conception. Sperm cells do not get depleted
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human egg contains only one set of chromosomes (23) and is said to be haploid. Sperm also have only one set of 23 chromosomes and are therefore haploid. When an egg and sperm fuse at fertilization, the two sets of chromosomes come together to form a unique "diploid" individual with 46 chromosomes. The sex chromosome in a human egg is always an X chromosome, since a female only has X sex chromosomes. In sperm, about half the sperm have an X chromosome and half have a Y chromosome. If an egg fuses
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by the use of intrauterine devices for contraception, miscarriage, childbirth and surgical abortion. In effect, PID blocks ova within the fallopian tubes. Among men, infertility can result from not having enough or any sperm, a semen deficiency, low sperm motility, poor sperm quality, epididymis or a blocked vas deferens. Solutions to Infertility There are a number of solutions to
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body by the ventral blood vessels. During mating, earthworms interchange sperm. All earthworms have a pair of male openings and a pair of sperm receptacles. Once a mate is found, they exchange sperm alongside each other with their heads facing towards opposite directions. They have sperm receptacles that take in the sperm during mating. Earthworms not only have sperm, but they also have two ovaries that produce eggs. Therefore they are hermaphroditic and have both male and female organs.
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