process called sperm sorting. Sperm sorting was initially developed as a means to regulate the gender of offspring in cattle. Sperm sorting is achieved through exploitation of the size difference between the X and Y chromosome. The X and Y chromosome are those that will determine the gender of an offspring. The egg of a female contains two X chromosomes‚ and each sperm from the male contains either an X or a Y. If the sperm that inseminates the egg contains a Y chromosome the egg will mature
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1 Class X: Biology Chapter 8: How Do Organisms Reproduce? Key Learnings 1) Reproduction is the biological process by which new individuals of the same kind are produced. 2) Reproduction is not essential for the survival of an organism‚ but is vital for the survival of a species. 3) Reproduction produces identical copies of the body design. 4) DNA is the informational macromolecule of our body. It provides information for protein synthesis. 5) During cellular reproduction‚ DNA duplication occurs
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Chapter 2: Biological Beginnings 2.1 The Evolutionary Perspective Natural Selection & Adaptive Behavior Natural Selection: the evolutionary process by which individuals of a species that are best adapted are the ones that survive and reproduce Charles Darwin wrote On the Origins of Species explaining how those who survive are better adapted to the world than the nonsurvivors Adaptive Behavior: behavior that promotes an organism’s survival in the natural habitat Example: the attachment between
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transfers sperm into the receptacles of the female blue crab. He female does not fertilize her eggs at this time however. The sperm stays in the receptacles and is saved for a later date in which the female will fertilize her eggs. The sperm that is in the female can last for up to a year and the sperm can be used on more than one occasion‚ up to two times fertilizing her eggs. Once blue crabs mate they are forced to move to a better location to reproduce. This area they lay their eggs is called
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naked and have sex‚ and nine months later‚ a baby pop out. But from the film we’ve watched‚ it shows the step by step process on how the egg cell and sperm cell meet and how is the baby created inside the body. When a man ejaculates‚ despite the millions of sperms cell produced and released ‚ only one can fertilized an egg. If an egg cell meets up with a healthy sperm on its way to the uterus‚ the two can join and begin the process of creating a new life. The first 12 weeks of pregnancy‚ known as the
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uniting of egg and sperm in a lab (in vitro). IVF is a form of assisted reproductive technology (ART). This means special medical techniques are used to help a woman become pregnant. IVF has been successfully used since 1978. It is most often tried when other‚ less expensive fertility techniques have failed. b. 5 Main Steps i. Monitor and stimulate the development of healthy egg(s) in the ovaries. ii. Collect the eggs. iii. Secure the sperm. iv. Combine the eggs and sperm together
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the barrier method. Caya is diaphragm that blocks sperm form reaching to the egg‚ which has to pair with Caya gel to use. The principle is similar to a condom. Caya is inserted into the top of the female’s vagina before having sex. After usage of Caya‚ it has to be taken out and cleaned before the next usage. The advantage is that the gel will deactivate the sperm. Additionally‚ the diaphragm itself physically blocks sperms to contact with the egg. Downside is‚ it is only 86.7% effective. That number
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video” Attached on other sheet Fertilization and polyspermy Fertilization: • Sperm squeezes through follicle cells • Sperm releases acrosomal enzymes so it can penetrate the zona pellucida • Sperm cell membrane fuses with egg cell membrane • Sperm enters egg‚ nucleus is released • Egg nucleus and sperm nucleus fuse forming a zygote Polyspermy: More than one sperm fertilizes the egg Cellular stages of development; Radial and spiral cleavage‚ formation of blastula Cleavage:
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Conception occurs when a male sperm cell from a fertile man goes through the vagina of a woman into the uterus and joins with the woman’s egg cell as it travels down one of the fallopian tubes from the ovary to the uterus. Once the fertilized egg continues to move down the fallopian tube‚ it begins to divide into two cells‚ then four cells‚ then more cells as the division continues (Diseases and Conditions). After the sperm has fertilized the egg‚ the fertilized the egg has traveled to the uterus
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They retrieve eggs from the mother and sperm from the father to perform in vitro fertilization‚ as well as prepare the embryos for insertion into the patient. The process of inserting the sperm into the egg (intracytoplasmic sperm injection) is done by the embryologist. They also prepare the embryo for transfer into the patient‚ making sure the embryo is in good shape‚ and
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