CELL DIVISION
MEIOSIS AND GENETIC VARIATION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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What is the best definition of chromosomes?
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A section of DNA that codes for a specific trait
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DNA that is packed up tightly (individually or in copies) > or ><
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The genetic traits that can only be observed in DNA
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The physical traits that can be observed
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Explanation:
Detailed explanation-1: -Figure 5: To better fit within the cell, long pieces of double-stranded DNA are tightly packed into structures called chromosomes.
Detailed explanation-2: -(KROH-muh-some) A structure found inside the nucleus of a cell. A chromosome is made up of proteins and DNA organized into genes. Each cell normally contains 23 pairs of chromosomes.
Detailed explanation-3: -Heterochromatin is very tightly packed and condensed. The formation of heterochromatin involves modifications to histones and the recruitment and spreading of silencing complexes, which cause changes to the structure of chromatin.
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