Introduction input

Gregor Mendel found out that certain traits are inherited from parents that change the next generations genetic makeup.this passes on and phenotypes can be passed on as well. This captured Mendel's attention. His pea plants are easily grown and can distinguish traits very easily. These traits don't blend and Mendel called the traits genes. These "genes" can affect the way that an organism can turn out. These pea plants cross pollinate, giving it an easy time to fertilize. The pea plants have two types of phenotype genes that only affect their color. This is hoe Mendel found out about the pea plants, because of the colors. Pure-bred seeds can change the way that the phenotypes turned out. A yellow seed and another yellow seed could create a green seed, but the way the flowers turned out were almost similar. These traits don't blend however. It's expected that a yellow and green seed would create a yellow-green seed. Mendel tested this and only yellow seeds were made. He provided the idea that traits don't, but are passed on through a parent's trait. Mendel's 7 traits that he focused on were flower position, stumbling, seed shape, seed color, seed coat color, pod shape, and pod color. These decided if some were different and some were the same. Generations of peas showed that generations can decide what traits are passed on. Of course, some of these traits were more common than others. These traits have been passed on from several generations and extended the population. The traits that have lasted much longer have extended to a wide variety of pea plants, create a very common trait in the population. This can be explained on how common the green pea is instead of the yellow pea. The green pea must have started much earlier. As well as dominant traits, hybrid offsprings always only copied one trait. If there were two different colored pods, only one color would passed on to the next generation. Now dominant genes are what genes are called if passed on through a cross fertilization. The genes that are not dominant are called recessive. Recessive genes don't often have their genes passed on. Recessive genes have a three to one ration to be passed on. This can be explained with Punnett Squares. Take two yellow peas. Each has a yellow seed and green seed factor. Green seeds are only formed if there are two green seeds from cross fertilizing. Yellow is anything else. In any combination, green is outnumbered three to one. This is Punnett Squares. If there are more genes besides the yellow and green, the squares are extended. An example are take and small genes for the plant. There ares different combinations for tall, small, yellow, and green seed plants. All of Mendel's theories were proven in 1900 by three European scientists. There was indeed genes that changed phenotypes and traits through generations. This wasn't treated well by scientists. A theory that cells supported life and passed it on was introduced. After some time, genetics (as it was called) was accepted. Cells started to be discussed. Cells are the basic supporters of live, and the beginning of life. Cels evolve over time and can become life over millions of years. Bacteria I'd an example of cells. Inside the cells, there is a nucleus, the controller of the cell. There are many parts in a cell that can support the cell. Not only this, but cells can reproduce over time.
Mendel published his findings in a book and there was an outbreak in scientific discovery. Scientists studied chromosomes very often, looking for ways to prove a discovery called cell division. Cells can divide themselves and replicate. There is a five step phase: interphase, prophase, metaphase, anaphase, telophase. Interphase is the resting phSe, were the nucleus is very thick. This is because the nucleus material is duplicating. The prophase takes the duplicated material and turns it into chromosomes. Metaphase is when each chromosome pair groups together and moves to the "equator" of the cell. The anaphase separates the duplicated and real chromosomes to the ends of the cells. The telophase keeps chromosomes separated in the cell. The cell splits and becomes two smaller ones. In the sexual reproduction process, chromosomes meet and exchange "information" that changes the way their offspring will act and think. Traits from these chromosomes are carried on to the offspring.
A man named Theodor Boveri studied worms in the late 1800s. Theodor knew to have sexual reproduction, there must be a contribution of material, and chromosomes. There should be double the chromosomes needed in a worm's reproduction process because they have the same amount as humans. There is a process that discovered that the chromosomes are halved. Through a process, homologies split from chromosomes and divide twice to create a set of chromosomes. So chromosomes create chromosomes. Each pair of homologies will only have only homology go to the organism.
Chromosomes also can determine which gender the organism will be. There are two types of chromosomes that determine the gender. One X is bigger than Y. The combination of XY cells are widely seen in male cells. While XX cells are seen in female. Since there is a male in female in sex, the chromosomes determine the gender. Since there is XX and XY. You take one of each pair to determine the gender. So that leaves with the options of XX and XY.
In summary, the chromosomes carry genes that can determine the traits and gender of offspring. The phenotypes can change the outside appearance and usually bring down traits through ancestry. This is Mendel's theory carried all the way to humans.