AP BIOLOGY

Detailed explanation-1: -Answer and Explanation: The rod-shaped structures in the cell nucleus that contain genes are called chromosomes. Chromosomes are individual pieces of DNA that contain many genes. Humans have 46 chromosomes in each cell nucleus.

Detailed explanation-2: -A telocentric chromosome is a chromosome in which the centromere is located at the terminal end of the chromosome and their shape is similar to the letter i or is rod-shaped. So, the correct answer is ‘Telocentric’.

Detailed explanation-3: -Each chromosome is made up of DNA tightly coiled many times around proteins called histones that support its structure.

Detailed explanation-4: -mitochondria – Rod-shaped cell structures that convert energy in food molecules to energy the cell can use to carry out its functions.

Detailed explanation-5: -DNA, found in the nucleus of plant and animal cells, is organized into structures called chromosomes. Cell biologists in the nineteenth century saw the rod shaped structures within cell nuclei and named the structures “chromosomes” because of the way they absorb colored stain.