1Which law of Mendels does the monohybrid cross demonstrate

1-Which law of Mendel\'s does the monohybrid cross demonstrate, and which law does the dihybrid cross demonstrate?

2-What happens to the alleles during gamete formation for each cross

Solution

1-Which law of Mendel\'s does the monohybrid cross demonstrate, and which law does the dihybrid cross demonstrate?

Answer 1: The Mendel\'s law of segregation demonstrates the monohybrid cross and Mendel\'s law of independent assortment demonstrates the dihybrid cross.

2-What happens to the alleles during gamete formation for each cross.

Answer 2: During gamete formation, each allele segregates. In a monohybrid cross, each parent has 2 alleles for a gene, which controls the same trait and contribute to different characteristics of that trait. For example, for flower color trait, the purple colored flowers will have 2 dominant alleles (PP) and white colored flowers will have 2 recessive alleles (pp) for the gene. All the gametes produced by one parent will have the same allele.

Parent generation: PP (purple flowers) x pp (while flowers)

Gametes formed: P p

F1 generation: Pp (Purple flowers)

In a dihybrid cross, each parent will have 4 alleles for 2 genes (2 for each gene), which controls 2 different traits and contribute to different characteristics of that trait.

Parent generation: YYRR (yellow and round seeds) x yyrr (green and wrinkled seeds)

Gametes formed: YR yr

F1 generation: YyRr (yellow and round seeds)