welcome : welcome genetics and heridity
About mendel : About mendel Gregor Mendel, the Austrian monk who figured out the rules of hereity is known as father of genetics. Mendel reasoned an organism for genetic experiments should have:
1-a number of different traits that can be studied
2-plant should be self-fertilizing and have a flower structure that limits accidental contact
3-offspring of self-fertilized plants should be fully fertile.
Therefore he chose garden pea(pisum sativum) for its experiment on genetics because it has got seven pair of contrasting characters located on four different chromosomes
Seven pair of contrasting characters : Seven pair of contrasting characters
Seven pair of contrasting characters : Seven pair of contrasting characters
Seven pair of contrasting characters : Seven pair of contrasting characters
Seven pair of contrasting characters : Seven pair of contrasting characters
What mendal laws proved : What mendal laws proved Mendel's work showed:
1-Each parent contributes one factor of each trait shown in offspring.
2-The two members of each pair of factors segregate from each other during gamete formation.
3-The blending theory of inheritance was discounted.
4-Males and females contribute equally to the traits in their offspring.
Acquired traits are not inherited.
Mendal laws of inheritance : Mendal laws of inheritance Mendal gave three laws to explain heridity
1-law of dominance
2-law of segregation
3-law of independent assortment
Law of dominance : Law of dominance When an organism has two different alleles for a trait, the allele that is expressed, overshadowing the expression of the other allele,is said to be dominant. The gene whose expression is overshadowed is said to be recessive
. Mendel's first principle of genetics, states that the sex cell of a plant or animal may contain one factor (allele) for different traits but not both factors needed to express the traits.
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