Alleles & Inheritance Flashcards
1
Q
What is a diploid?
A
2 sets of chromosomes
2
Q
What do chromosomes have?
A
The same genes
3
Q
What gender is XY?
A
MAN
4
Q
What gender is XX?
A
WOMEN
5
Q
What is a allele?
A
Different versions of the same gene
6
Q
Give examples of what a allele is.
A
Gene = eye colour Allele = blue, green, brown
7
Q
What is a dominant allele?
A
One copy is needed
8
Q
What is a recessive allele?
A
Two copies are needed
9
Q
What does homozygous mean?
A
2 copies of the same allele
10
Q
What does heterozygous mean?
A
2 different alleles
11
Q
What are phenotypes?
A
Physical appearance / characteristics
12
Q
What does it mean if something is a genotype?
A
Has alleles present
13
Q
What is a mutation?
A
A change in the sequence of bases in the genetic code
14
Q
When do mutations happen?
A
When there is a mistake in copying DNA during cell division
