wiz-icon
MyQuestionIcon
MyQuestionIcon
2
You visited us 2 times! Enjoying our articles? Unlock Full Access!
Question

Choose the correct answer from the alternatives given.
More than two alternate forms of a gene present on the same locus are called (i). They are produced due to repeated (ii) of the same gene but in different directions. Their well known example is (iii) W
hich of the following correctly fills the above statement?

A
(i) - epistatic genes, (ii) - crossing over, (iii) - polydactyly
No worries! We‘ve got your back. Try BYJU‘S free classes today!
B
(i) - multiple alleles, (ii) mutations, (iii) - human blood groups
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
C
(i) supplementary genes (ii) mutations, (iii) - hypertrichosis
No worries! We‘ve got your back. Try BYJU‘S free classes today!
D
(i) - linked genes, (ii) - crossing over, (iii) - alkaptonuria
No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution

The correct option is B (i) - multiple alleles, (ii) mutations, (iii) - human blood groups
Three or more alternative forms of a gene (alleles) that can occupy the same locus are called as multiple alleles. A mutation in any base pair can cause a new allele. Multiple alleles combine in different ways in a population, and produce different phenotypes. These phenotypes are caused by the proteins encoded for by the various alleles. An excellent example of multiple allele inheritance is human blood type. Blood type exists as four possible phenotypes: A, B, AB, & O. There are 3 alleles for the gene that determines blood type.
So, the correct option is '(i) - multiple alleles, (ii) mutations, (iii) - human blood groups'.

flag
Suggest Corrections
thumbs-up
0
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
Evidences of Evolution
BIOLOGY
Watch in App
Join BYJU'S Learning Program
CrossIcon