Question
Genes for cytoplasmic male sterility in plants are generally located in
mitochondrial genome
cytosol
chloroplast genome
nuclear genome
Solution
A.
mitochondrial genome
Mitochondria are the eukaryotic cell organelles. These originate from pre-existing mitochondria only. Also known as semi autonomous organelles because they consists of a circular, double stranded DNA molecule, RNA and 70 S type of ribosome. The genes, located outside of nucleus (i.e., within the cytoplasm) also governes some traits and are referred as plasmogenes or cytoplasmic genes. Cytoplasmic male sterility (i.e., dominance of female cytoplasmic genes over male) is due to plasmogenes located in mitochondrial DNA (mtDNA).
