Random Segregation Class Notes - Edubirdie

University:
Western Sydney University
Course:
MEDI 2003 | Clinical Sciences 2
Academic year:

2024
Views:

110

Pages:

4
Author:

Mariam A. A.

Random segregation Each person has two genes that determine every characteristic, like hair or eye colour (or, in the case of those plants, flower colour). Your mother has two genes for her eye colour and your father has two genes for his eye colour. But you only get one from each. The law of segregation says that the one you get from each parent is random. Mendel’s Experiments Mendel’s Laws Law of dominance: Mendel's law of dominance states that in a heterozygote, one trait will conceal the presence of another trait for the same characteristic (in other words, the dominant allele is the one that overpowers the recessive allele, and thus is the one that is expressed. However, the recessive allele is in the genotype, but is not expressed in the phenotype of that person. However, that recessive allele may be passed to the offspring and may appear if the offspring also gets that type of allele for the second parent.) Rather than both alleles contributing to a phenotype, the dominant allele will be expressed. Law of random segregation: Only one of the two gene copies present in an organism is distributed to each gamete (egg or sperm cell) that it makes, and the allocation of the gene copies is random. When an egg and a sperm join in fertilization, they form a new organism, whose genotype consists of the alleles contained in the gametes. Law of independent assortment: Mendel's law of independent assortment states that the alleles of two (or more) different genes get sorted into gametes independently of one another. In other words, the allele a gamete receives for one gene does not influence the allele received for another gene.

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