Question

How do Mendel's experiments show that traits may be dominant or recessive?

Answer 1

1. Mendal conduct experiment on garden pea plant selecting visible contrasting characters.

2. He collected the crossed homozygous tall pea plant having the genotype TT with the homozygous dwarf pea plant having the genotype tt.

3. F1 generation consists only of tall plant having genotype Tt. Etc

4. On this basis he proposed "the law of dominance.

Answer 2

According to law of dominance, an attribute is painted by 2 contrastive factors of a factor during a heterozygous individual; the allele/factor that may specific itself in heterozygous individual is named as dominant trait. The opposite issue whose impact is cloaked by presence of dominant factor, is named recessive issue. Once Johann Mendel crossed one tall and one short leguminous plant, all the off springs (F1 generation) were tall. Once he self-crossed the F1 generation, among them 3/4th of the progenies were tall whereas 1/4th were short. So he ended that though the F1 relation had each tall and short traits, solely tall plants were discovered within the F1 generation, this implies that tallness may be a dominant attribute.