You have decided to start growing pea plants in your garden that are of the same species as the ones Mendel grew to see if you can recapitulate some of his experiments. The two traits you start with are purple vs white flowers and tall vs dwarf (with purple and tall being dominant). A neighbor shares some of their tall, purple flowered plants with you, knowing from those you should be able to get every possible combination, but they warn you that they have not been paying attention to how they are pollinating one another, and therefore they aren’t sure which of them are homozygotes and which are heterozygotes for each trait.What are the possible genotypes for these purple, tall plants?
You have decided to start growing pea plants in your garden that are of the same species as the ones Mendel grew to see if you can recapitulate some of his experiments. The two traits you start with are purple vs white flowers and tall vs dwarf (with purple and tall being dominant). A neighbor shares some of their tall, purple flowered plants with you, knowing from those you should be able to get every possible combination, but they warn you that they have not been paying attention to how they are pollinating one another, and therefore they aren’t sure which of them are homozygotes and which are heterozygotes for each trait.What are the possible genotypes for these purple, tall plants?
Mendel on working on the pea plants proposed 3 mendelian laws, the traits or genes which inherit by obeying those laws are said to be in mendelian inheritance.
- Law of segregation: there are two alleles present on the opposite chromosomes in an organism and according to this law during gamete formation each one allele enters one gamete and other allele enters another gamete.
- Law of independent assortment: in this law if we are considering two different genes and each gene segregates independently and doesn’t depend on the other gene for segregation.
- Law of dominance: there are minimum 2 alleles and maximum n alleles for genes. In them some alleles will be dominant and others are recessive. According to this law presence of one dominant allele in the genotype gives shows its presence in the phenotype.
Taking T as the tall allele and t as the dwarf allele
TT gives tall plant homozygous where two alleles are same and tt gives dwarf plant but homozygous
Tt gives tall plant because T is dominant but it is heterozygous condition because two different alleles are present in an individual.
Taking P as the purple allele and p as the white allele
PP gives purple plant homozygous where two alleles are same and pp gives white plant but homozygous
Pp gives Purple plant because P is dominant but it is heterozygous condition because two different alleles are present in an individual.
Trending now
This is a popular solution!
Step by step
Solved in 3 steps
