Teaching MPPSC Assistant Professor Mock Test Series 2025 Life Sciences Inheritance Biology Extensions of Mendelian principles
Brassica juncea has bisexual flowers.
A mutation in the mitochondria leads to cytoplasmic male sterility (CMS). CMS can be restored by a restorer of fertility gene ( Rf ) which is a nuclear gene.
Fertility restoration is a dominant phenotype.
A CMS line is crossed to a homozygous Rf line. The obtained F1 progeny is selfpollinated. What percentage of F2 progeny will be male sterile?
1
0
2
25
3
75
4
100