Describe Mendel’s Monohybrid experiment.

Vedclass pdf generator app on play store
Vedclass iOS app on app store

If we use alphabetical symbols for each gene then the capital letter is used for the trait expressed at the $F_{1}$ stage and the small alphabet for the other trait.

For example, in case of the character of height ' $\mathrm{T}$ ' is used for the Tall trait and ' $\mathrm{t}^{\prime}$ for the 'dwarf' and ' $\mathrm{T}$ ' and ' $\mathrm{t}$ ' are alleles of each other.

- Hence in plants the pair of alleles for height would be $TT$, $Tt$ or $tt.$

- Mendel also proposed that in a true breeding tall or dwarf pea variety the allelic pair of genes for height are identical or homozygous, $TT$ and $\mathrm{tt}$ respectively.

$TT$ and $\mathrm{tt}$ are called genotype of the plant while the descriptive terms tall and dwarf are the phenotyped.

As Mendel found the phenotype of the $F_{1}$ heterozygote $\mathrm{Tt}$ to be exactly like $TT$ parent in appearance he proposed that in a pair of dissimilar factors, one dominates the other (as in the $F_{1}$ ) and hence is called the dominant factor while the other characters/trait pairs that he studied.

967-s22

Similar Questions

An allele is said to be dominant if

  • [AIPMT 1999]

Definitions / Explanation : Homozygous
 

Mendel's contribution for genetic inheritance was

Find out the percentage of dominant phenotype in cross between $P_p$ and $P_p$. $P-$dominant, $p-$recessive

Give differences : Dominance and Recessive