DNA. Deoxyribonucleic acid (DNA<span>) is a nucleic acid that contains the genetic instructions for the development and function of </span>living things<span>. All known cellular life and some viruses contain </span>DNA<span>. The main role of </span>DNA<span> in the cell is the long-term storage of information.</span>
Cell division is when the cell divides its chromisomes. Replication is when it replicates or makes another dna molocule like it.
Answer:
c) growth of the cell and replication of DNA prepare the cell for division
Answer:
Chromosome number variation: B. Down syndrome
Loss-of-function allele : D. PKU
Physiological trait
: E. Lactose metabolism
Discovery-based science
: A. Human Genome Project
Genetic cross: C. Model organism
Explanation:
Down syndrome is a condition in which there is an extra copy of the chromosome number 21. Hence, it is a chromosome number variation.
Physiological traits refers to any function of a body. Hence, it matches with lactose metabolism.
Human Genome Project was a project under which the whole genome of the humans were sequenced. Hence, it is a discovery based science.
A genetic cross is made between model organisms to test for the offsprings that would be produced from a cross. Hence, genetic cross and model organism math with each other.
