Mendelian inheritance 1.docx

Monohybrid cross Involved 2 alleles at a single gene locus. Mendel’s conclusion The traits were not lost in F1 generation. The recessive trait is hidden by the presence of the dominant gene. Mendel’s first law- law of segregation Gametes only have 1 allele. After fertilisation, zygote will have 1 al...

Monohybrid cross Involved 2 alleles at a single gene locus. Mendel’s conclusion The traits were not lost in F1 generation. The recessive trait is hidden by the presence of the dominant gene. Mendel’s first law- law of segregation Gametes only have 1 allele. After fertilisation, zygote will have 1 allele from paternal and one from maternal. Dihybrid- A cross involving 2 loci- 2 gene loci. Produces a ratio of 9:3:3:1 Law of independent assortment During gamete formation, pairs of alleles of different traits separate independently from each other. Different traits are inherited independently of each other. Inheritance that obeys both the Mendel’s first and second law is known as ‘simple mendelian inheritance’. Monohybrid cross Dihybrid cross To be completed