help mw prepare my exam please Mendelian Genetics Explain who Mendel was and wha
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help mw prepare my exam please
Mendelian Genetics Explain who Mendel was and what he was doing Explain why pea plants were such a great model organisms to use Distinguish between monohybrid and dihybrid crosses o Describe what happens in each . Distinguish genotype from phenotype Explain reciprocal cross and test cross o Describe the expected offspring of both crosses Distinguish between homozygous and heterozygous . Draw or interpret a Punnett square . List and explain Mendel's rules for inheritanceExplanation / Answer
G. J. Mendel was an Austrian Monk. He discovered Hereditary laws popularly called Mendel Laws for which he became Father of Classical Genetics
Pea plant possess: Short Reproductive Cycle, Monoeciou or Bisexual flowers which facilitate self pollination, Exhibits Non linked, Isolated and Distinct Characters
In Monohybrid cross, hybridization takesplace between 2 plants that exhibiting alternative forms of single character. Here in F2 The Genotypic ratio is 1:2:1 and Phenotypic ratio is 3:1. Where as in Dihybrid cross, hybridization takesplace between 2 plants, exhibiting alternative forms of 2 characters
In F2 Genotypic ratio is: 1:2:1:2:4:2:1:2:1
Phenotype ratio :9:3:3:1
In Monohybrid cross no independent assortment takes place that occurred in Di hybrid cross. Due to this, dihybrid cross generate new hybrid characters
Genetic Constitution of an organism is Genotype
Physical appearance of a character or Trait is Phenotype
Each character encoded by 2 alleles . If the two alleles are same. Then the character is Homozygous (TT or tt). If the two alleles are different , then the character is Heterozygous (Tt)
TT (Male) x tt (Female) ----> Normal Cross
tt (Male) x TT (Female ) ----> Reciprocal Cross
Parent cross with Homozygous recessive, then that is Test Cross
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