Question

Number of linkage groups in Pisum sativum is
A) 2
B) 4
C) 7
D) 8

Answer 1

Hint: The pea is most ordinarily the tiny spherical seed or the seed-pod of the pod fruit pea. Every pod contains many peas, which might be inexperienced or yellow. Botanically, pea pods square measure fruit, since they contain seeds and develop from the ovary of a flower.

Complete answer:
Due to their presence on the same chromosome, linkage is the phenomenon of certain genes staying together during inheritance through generations without any change or separation. Sutton and Boveri (1902-1903) proposed linkage when they proposed the famous "chromosomal theory of inheritance".
The garden pea, pea was the model system employed by Johann Mendel to formulate his celebrated Mendel's laws. However the characters employed by Johann Mendel are since shown to be controlled by genes happiness to completely different clusters,linked genes, gene, cistron, factors or to distant components of identical linkage groups.
Thus, Johann Mendel did not observe the development of linkage. Instead, linkage was 1st represented and taken by Thomas Morgan in his works with pomace fly. Linkage in pea was 1st represented in 1912 by Vilmorin and Bateson.
If pea genetics begins with Gregor Mendel, the pea linkage map begins much later. Pea has seven linkage groups, which are found on chromosomes 1, 6, 5, 7, 3, 2, and 4.

As a result, the correct answer is Option C '7.'

Note:
Genes that are linked are found on the same chromosome, whereas genes that are unlinked are found on different chromosomes. Breeding experiments can easily reveal linked and unlinked genes. With two parental and two recombinant types, unlinked genes show independent assortment, with a di-hybrid ratio of 9: 3: 3: 1 and a di-hybrid or double test cross ratio of 1: 1: 1: 1.