Question

Match the column-I with column-II and choose the correct option.

	Column I		Column II
A.	Incomplete Dominance	I.	Drosophila
B.	Mendelian Disorder	II.	Antirrhinum sp.
C.	Transforming Principle	III.	Griffith
D.	Dihybrid Cross	IV.	Haemophilia

(A) A-I; B-IV; C-III; D-II
(B) A-IV; B-II; C-III; D-I
(C) A-II; B-III; C-IV; D-I
(D) A-II; B-IV; C-III; D-I

Answer 1

Hint: Mendelian disorders are a subset of genetic disorders that originate from changes in a single gene or from abnormalities in the genome. Incomplete dominance occurs when one or both alleles of a gene are only partially expressed at a particular location. A different or intermediate phenotype is typically produced by this kind of gene interaction. A dihybrid cross is made up of two people who have two features that are regulated by two different genes.

Complete Step by Step Answer:
The phenotype of a heterozygous dominant person is a combination of dominant and recessive traits when none of the elements of a gene are dominant. We refer to this as incomplete dominance. For instance, the Mirabilis jalapa blossom color. The white flower has a recessive personality while the red flower has a dominating personality. The phenomenon of incomplete dominance, first described by Correns, occurs when the dominant allele does not fully express itself. A good illustration of partial dominance is the transmission of flower color in Antirrhinum species. A sexually transmitted, recessive illness, is hemophilia. It falls under the category of a Mendelian condition since pedigree analysis may show how it is inherited according to Mendelian genetics. Griffith provided the transformative concept. When two allelic pairs are employed as the crossing, the result is a dihybrid cross. To investigate genes that were sex-linked, several dihybrid crossings of Drosophila were performed.
So, option (D) is the correct answer.
Note: An early experiment for DNA was the Transforming principle. One bacterium picks up floating DNA and incorporates it into its own genome, which results in transformation. Griffith talked about transforming principle while working on Sreptococus pneumoniae.