Biology for IGCSE & O level - Inheritance (Section 1 - No. 25)
Which of the following are key features of a gene?
It is a sequence of nucleotides.
It codes for proteins and/or RNA.
It is always expressed.
It is found in chromosomes.
Vysvětlení
Genes are DNA sequences that code for proteins or RNA, located on chromosomes. Gene expression is regulated.