DNA
Deoxyribonucleic Acid
The four bases of RNA.
Adenine
Cytosine
Guanine
Uracil
True or False:
All mutations are bad.
False
How many pairs of chromosomes do we have?
23
Where is DNA found?
The nucleus.
The shape of DNA.
Double Helix
What does RNA stand for?
Ribonucleic acid
A permanent change to DNA
Mutation
What are chromosomes made of?
Tightly wound DNA.
Type of mutation where a base pair is removed.
Deletion Mutation
The four bases of DNA.
Adenine
Cytosine
Guanine
Thymine
What does mRNA do?
Carries genetic information in the cells from nucleus to ribosomes.
An example of an environmental factor that can cause mutations.
How many copies of a gene are there?
Two, one on each chromosome in a pair.
Carries amino acids to ribosomes to make proteins.
tRNA
Makes up the backbone of DNA?
Where are proteins made?
The ribosomes.
True or False:
Most mutations occur randomly.
True
Most genes contain codes for making:
Proteins
This ensures the survival of a species over time.
Mutations
How does DNA replicate?
It splits down the middle between the two base pairs. Then the matching base pairs come and bond to the exposed bases and two identical strands of DNA are made.
Amino acids
Example of neutral mutation.
Mutation that changes eye color.
Part of DNA's code that is on a chromosome.
gene
Type of mutation where a new base pair is added.
Insertion mutation.