Answer: Option [B]The correct answer is Strasburger. Strasburger in 1875 first observed chromosome during cell division and described chromosomes as thread like structures in nucleus.
Answer: Option [B]Genes are made up of polynucleotides. A polynucleotide molecule is a biopolymer composed of 13 or more nucleotide monomers covalently bonded in a chain. DNA and RNA are examples of polynucleotides with distinct biological function.
Answer: Option [A]The correct answer is DNA. DNA results in the formation of RNA which results in the formation of proteins and thus decides the phenotype. Thus, the component of a chromosome that controls heredity and inheritance is DNA.
Answer: Option [C]The term 'gene' refers to a portions of DNA. Genes are made up of sequences of DNA and are arranged, one after another, at specific locations on chromosomes in the nucleus of cells.
