DNA Flashcards
1
Q
How many chromosomes are in the human body?
A
46 chromosomes in the human body cell
2
Q
What are genes?
A
A short section of DNA, also a code for making proteins (enzymes) that control characteristics within the body
3
Q
What are different forms of the same gene called?
A
Alleles they can be dominant or recessive
4
Q
What does dominant and recessive?
A
Dominant-will develop if the allele is present in one or both chromosome pair
Recessive-will develop only if both chromosomes contain the allele
5
Q
What do the terms heterozygous and homozygous mean?
A
Heterozygous- when the alleles are different
Homozygous-when the alleles are the same
6
Q
What is the structure of a nucleotide?
A
Phosphate
Sugar (deoxyribose)
Base(A,T,G or C)
7
Q
What is the 3d form of DNA called?
A
Double helix
