QUESTION 3 In Mendel's pea plants, round shape (R) is dominant to wrinkled shape (r), and yellow color (Y) is dominant to green color (y). The alleles for seed shape and seed color sort independently. In the parental generation, Mendel crossed a true-breeding round, yellow-seeded plant with a true-breeding wrinkled, green-seeded plant to create an F1 generation. He then crossed the F1 offspring to eachother. What type of cross is this considered? O Dihybrid cross Heterozygous cross Testcross Genetic cross O Monohybrid cross
The inventor of modern genetics, an Austrian monk named Gregor Mendel, developed his rules of heredity through experiments in which he crossed pea plants with various traits. Genetic crosses come in a variety of popular forms.
At a specific genomic region, an allele is one of two or more variations of the DNA sequence (a single base or a segment of nucleotides). For each genomic region with such variation, an individual inherits two alleles, one from each parent. The person is homozygous for the allele if the two alleles are the same.
Allele pairings are categorized using the terms homozygous and heterozygous. Homozygous individuals are those who have two copies of the same allele (RR or rr). While heterozygous refers to a particular organism with various alleles (Rr).
basically there are 3 types of genetic crosses :
1) Monohybrid cross: A monohybrid cross is made up of two homozygous individuals that have the opposing phenotype for a particular genetic characteristic. "A monohybrid cross is a cross between two monohybrid characteristics (TT and tt)." The monohybrid cross is in charge of passing one gene on.
2) Dihybrid cross: A mating experiment involving two organisms that are equally hybrid for two traits is referred to as a dihybrid cross. A heterozygous organism is one that possesses two distinct alleles at a certain genetic location, making it a hybrid.
3) Test cross: A test cross is a genetic experiment that involves crossing a homozygous recessive organism having a dominant phenotype with an unidentified genotype (and phenotype).
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