Question

Mendel formulated the law of purity of gametes on the basis of

• A. Dihybrid cross
• B. Monohybrid cross
• C. Back cross
• D. Test cross

Answer 1

The correct option is B

Monohybrid cross

The correct option is B.

Explanation of the correct option:

1. A gamete may also bring both the dominant or the recessive factor but now no longer both as we discover in F1 individuals.
2. This is why it is referred to as ‘regulation of purity of gametes’.
3. Monohybrid cross refers to mating among organisms with unique variations at one genetic chromosome of interest.
4. The characters which might be studied in a monohybrid cross are ruled through more than one variation for an unmarried locus.
5. When natural homozygous tall (TT) and dwarf (tt) vegetation are crossed, we get all tall plants inside the F1 generation.
6. When those F1 hybrids are crossed, we get tall and dwarf vegetation, withinside the ratio of 3:1.
7. This indicates that the trends now no longer get combined with the hybrid and are separated at the time of gametogenesis.
8. This is referred to as the regulation of segregation of purity of gametes.

Explanation of the incorrect options:

Option A:

1. Dihybrid cross-refers to mating among organisms with unique versions at two genetic chromosomes of interest.
2. The character(s) being studied in a dihybrid cross are governed through two versions for a single locus.

Option C:

Backcrossing is a crossing of a hybrid with one in every of its mother and father or a man or woman genetically just like its parent, to acquire offspring with a genetic identification towards that of the parent.

Option D:

A man or woman expressing a dominant phenotype should include both copies of the dominant allele or one replica of every dominant and recessive allele.

Final answer: Mendel formulated the regulation of purity of gametes on the premise of the Monohybrid cross.