Science 15 questions Flashcards
1
Q
Define Allele
A
A different version of the same gene
2
Q
How many pairs of chromosomes are found within the human genome?
A
23
3
Q
Heterozygous
A
An organism has two different alleles
4
Q
Recessive Allele
A
An allele that is only expressed when 2 copies are inherited
5
Q
Sex chromosome for a man
A
XY
6
Q
Mutation
A
A change in the sequence of bases in DNA
7
Q
Name the enzyme which cuts the DNA strand
A
Restriction Enzyme
8
Q
Name the enzyme which joins DNA strands back together
A
Ligase
9
Q
What is a ‘small circle strand of DNA’
A
Plasmid
10
Q
Define Dominant Allele
A
An allele that is always expressed
11
Q
Genome
A
The entire set of genes
