plz explain Mendel's laws
Answers
Mendel's Laws of Heredity are usually stated as: 1) The Law of Segregation: Each inherited trait is defined by a gene pair. ... 2) The Law of Independent Assortment: Genes for different traits are sorted separately from one another so that the inheritance of one trait is not dependent on the inheritance of another.
Answer:
Law of Dominance: When a pair of contrasting characters is crossed then only one of the characters is expressed in F generation. This is called law of dominance. For example, when a homozygous tall plant (TT) is crossed with a homozygous short plant (tt), then all the plants of F generation are tall (Tt) because tallness is the dominant character.
Law of Segregation: This is also known as law of purity of gametes. As per this law, during the gametogeneis of heterozygous plant, each gene of a pair of allele goes to different gametes. Because of segregation of genes of a pair of alleles, it is called the law of segregation.
For example, when a homozygous tall plant (TT) is crosses with a homozygous short plant (tt), all the plants of F generation are tall plants (Tt) but heterozygous. But during the combination of genes in F generation, one gene does not pollute another gene and each gene maintains its purity. Due to this, when plants of F generation are allowed to produce the next generation, the recessive character, i.e. shortness expresses itself.
Law of Independent Assortment: When plants with two or more than two characters are crossed then expression of one character does not affect the expression of another character. Genes from a pair of alleles segregate and are free to combine with any other gene from any other pair of alleles. This is called law of independent assortment.