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).

1. 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)