BRAINLST PLEASE :
1.Why don't you like a rhinoceros
Heredity - the passing of traits from parents to the offspring that they produce.
There has been a question for many years and that question is why do you have some traits that might be totally different from your parent, for example you have curly hair but your parents have straight hair. A man named Gregor Mendel about 150 years ago found some of the answers toward this question. He cultivated plants
Who was Gregor Mendel
Gregor Mendel was born in 1822 in Heinzendorf Austria. He grew up on a farm so he learned all about different kinds of plants, he has always been fascinated by nature, after he finished learning at a university he decided to go to a monastery, he worked at the gardens that were there in the monastery while there he got to learn all about how traits were passed from parents to their offspring. This all happened by studying plants in the monastery garden. Gregor was a monk
Unraveling the Mystery
He noticed patterns in traits showing up and then sometimes not showing up, so he wanted to find out why he this was occurring. Why did some traits not show up until the third or fourth generation. The Garden Pea plant was the item he used to conduct his research upon.
How do you like your peas
He choose this plant because they grow quickly, usually self pollinating, and they come in many different kinds.
Self Pollinating - A self pollinating plant contains both female and male reproductive structures. This also means that pollen from one flower or plant is able to fertilize the eggs of another plant or flower but of the same kind.
FIGURE 3 IN BOOK
During pollination pollen containing sperm from the anthers (male) is transferred to the stigma (female). Fertilization occurs when a sperm from the pollen travels through the stigma and enters the egg in an ovule
Peas be my Ponder
To keep things easy in his research Mendel decided to only study one characteristic of the plant at a time. Also he only choose plants that would have two forms of all of the characteristics that he was studying. Mendel selected a plant that would always end up producing purple flowers and then one that would always produce a white flower, purple and white are the two main traits for the characteristic of flower's colors
True Breeding plants
True breeding plants - self pollinates it will always end up producing offspring with the same trait the parent plant has. EX: if a parent plant was tall then the offspring will be tall. He was curious what would happen if he took two plants with the different forms of a single trait and crossed them, to do this experiment he used a method known as Cross Pollination. Cross Pollination - the anthers of one plant are removed so the plant isn't allowed to self pollinate. Then they take pollen from another plant and use that pollen to fertilize the plant without the anthers. This way Mendel could figure out which pollen would fertilize which plant
Mendel's First Experiment
He crossed two plants one of the plants produced round seeds and then one that produced wrinkled seeds. Each of the different traits wrinkled seeds and round seeds would appear and vanish - change - throughout different offspring. He decided to have the trait that appeared more the dominant trait and the one that recessed the recessive trait.
Mendel's second experiment
Mendel did a second experiment - let the first generation plant self pollinate from each of the seven crosses. This time around the rounded shaped seed was allowed to self pollinate. The recessive trait of wrinkled seeds popped up again. He also performed the same experiment on the second plant of the seven characteristics. When the first generation was allowed to self pollinate then the recessive trait started to appear in the beans again.
2.In simple terms, Mendel's theory says that individual traits are "coded' by pairs of particles. In reproduction, one particle would be contributed by each parent for every trait. This observation is known as the Law of Segregation. ... Mendel's Laws of Inheritance helped revive Darwin's theory.
3.The chromosomal theory of inheritance holds that the separation of maternal and paternal chromosomes during gamete formation is the physical basis of Mendelian inheritance. ... He hypothesized that a mutation expressed predominantly in males must be carried on the X chromosome.
4.For Gregor Mendel, pea plants were fundamental in allowing him to understand the means by which traits are inherited between parent and offspring. He chose pea plants because they were easy to grow, could be bred rapidly, and had several observable characteristics, like petal color and pea color.
