Branden+Snook

Bio, huzzah!- Mr Smith

YES! BIO HUZZAH INDEED Another huzzah goes off to artificial selection for its vast and wide work it has done to change animals forever, but does it come at a price? lets find out, shall we?

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More commonly known as selective breeding, where professionals study the genotype and phenotype of parent organisms in the hope of producing a hybrid that possesses many of the desirable characteristics found in their parents.



We face artificial selection everyday without even really thinking about it. Heres a way to ruin your dinner! Think of this! After watching the video above and seeing how artificial selection can have negative effects on animals, heres some great examples of other animals we use this on -chickens(some for meat, some for eggs) -Cows(some for milk, some for meat) -silver fox(have been modified to be pets) -pigs(bread for size)

You may think nothing of this topic and you may just brush it off but when thought in depth it can become some heavy stuff. In my opinion I find it rather gross of what we have done to these animals throughout the years to accommodate us, especially with pure bread dogs, we have basically cloned them with the extremely incest breading and we are destroying there species more everyday!!

YUM FRUIT

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Artificial selection goes as far as changing our fruit!

The fastness of artificial selection is unbelievable!

And to finish off

SUPER COWS!

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=__Genetics__=

You may be asking to yourself, what is genetics? Sure you've probably heard the word but what really is genetics?

Genetics is the study of heredity. Heredity is a biological process where a parent passes certain genes onto their children or offspring. Every child inherits genes from both of their biological parents and these genes in turn express specific traits. Some of these traits may be physical for example hair and eye color and skin color etc. On the other hand some genes may also carry the risk of certain diseases and disorders that may pass on from parents to their offspring.

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The genetic information lies within the cell nucleus of each living cell in the body. The information can be considered to be retained in a book for example. Part of this book with the genetic information comes from the father while the other part comes from the mother. The genes lie within the chromosomes. Humans have 23 pairs of these small thread-like structures in the nucleus of their cells. 23 or half of the total 46 comes from the mother while the other 23 comes from the father.

Women have 46 chromosomes (44 autosomes plus two copies of the X chromosome) in their body cells. They have half of this or 22 autosomes plus an X chromosome in their egg cells. Men have 46 chromosomes (44 autosomes plus an X and a Y chromosome) in their body cells and have half of these 22 autosomes plus an X or Y chromosome in their sperm cells. When the egg joins with the sperm, the resultant baby has 46 chromosomes (with either an XX in a female baby or XY in a male baby).

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=__The Endocrine System__= Although we rarely think about the endocrine system, it influences almost every cell, organ, and function of our bodies. The endocrine system is instrumental in regulating mood, growth and development, tissue function, metabolism, and sexual function and reproductive processes. In general, the endocrine system is in charge of body processes that happen slowly, such as cell growth. Faster processes like breathing and body movement are controlled by the nervous system. But even though the nervous system and endocrine system are separate systems, they often work together to help the body function properly. The foundations of the endocrine system are the hormones and glands. As the body's chemical messengers, ** hormones ** transfer information and instructions from one set of cells to another. Many different hormones move through the bloodstream, but each type of hormone is designed to affect only certain cells.

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A gland is a group of cells that produces and secretes, or gives off, chemicals. A gland selects and removes materials from the blood, processes them, and secretes the finished chemical product for use somewhere in the body. Some types of glands release their secretions in specific areas. For instance, exocrine glands, such as the sweat and salivary glands, release secretions in the skin or inside the mouth. Endocrine glands, on the other hand, release more than 20 major hormones directly into the bloodstream where they can be transported to cells in other parts of the body.

The major glands that make up the human endocrine system include the:
 * hypothalamus
 * pituitary gland
 * thyroid
 * parathyroids
 * adrenal glands
 * pineal body
 * reproductive glands (which include the ovaries and testes)
 * pancreas