Genetics Flashcards
1
Q
The nucleus of…
A
a cell contains DNA made of chromosomes
2
Q
Chromosomes are…
A
arranged in pairs
3
Q
Humans have…
A
2 copies of each gene
4
Q
A version of…
A
a gene is called an allele
5
Q
What are alleles?
A
Some characteristics are caused by a single gene
6
Q
An example allele is
A
fur colour in mice
7
Q
Alleles can be
A
represented with letters
8
Q
For a dominant allele to be
expressed, how many copies of
the allele are needed?
A
1
9
Q
For a recessive allele to be
expressed, how many copies
of the allele are needed?
A
2
10
Q
The combination of alleles that
the cause is a characteristic called
the…
A
Genetype
11
Q
The characteristic which is
expressed is called the…
A
Phenotype
12
Q
Homozygous alleles
A
The same alleles
13
Q
Heterozygous alleles
A
Different alleles
