[Audio] The word chromosome was coined by Waldeyer in 1888 Chroma meaning color and soma meaning body Chromosome looks like a thread and is a coiled material.
[Audio] They are always present in the nucleus and most visible during M phase of cell cycle They carry and transfer genetic information from generation to generation.
SISTER CHROMATIDS.
CENTROMERE OR PRIMARY CONTRICTIONS. SISTER CHROMATIDS.
CHROMONEMA. DNA. DNA (60%). PROTEINS HISTONES(40%).
SECONDARY CONTRICTION. SAT CHROMOSOMES. TELOMERES (SATELLITE).
DIFFERENT TYPES OF SHAPE. Centromere location Middle Between middle and end Close to end At end Designation Metacentric Submetacentric Acrocentric Telocentric Metaphase shape p arm Centromere q arm Anaphase shape.