What is DNA?
DNA, Genetics and Mutations 2022

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•
Biology
•
7th Grade
•
Hard
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1.
FLASHCARD QUESTION
Front
Back
DNA (Deoxyribonucleic Acid) is the molecule that carries the genetic instructions for life. It is composed of two strands that coil around each other to form a double helix.
2.
FLASHCARD QUESTION
Front
What are chromosomes?
Back
Chromosomes are long, thread-like structures made of DNA and proteins that contain genetic information. Humans have 23 pairs of chromosomes.
3.
FLASHCARD QUESTION
Front
What is a gene?
Back
A gene is a segment of DNA that contains the instructions for making a specific protein or set of proteins, which determine traits.
4.
FLASHCARD QUESTION
Front
What is the difference between genotype and phenotype?
Back
Genotype refers to the genetic makeup of an organism (the alleles it carries), while phenotype is the observable characteristics or traits of that organism.
5.
FLASHCARD QUESTION
Front
What are alleles?
Back
Alleles are different versions of a gene that can exist at a specific locus on a chromosome. For example, the gene for flower color may have a purple allele and a white allele.
6.
FLASHCARD QUESTION
Front
What is a mutation?
Back
A mutation is a change in the DNA sequence that can lead to changes in the structure and function of proteins, potentially resulting in different traits.
7.
FLASHCARD QUESTION
Front
What is mitosis?
Back
Mitosis is the process of cell division that results in two genetically identical daughter cells, each with the same number of chromosomes as the parent cell.
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