B2 5.5: Inheritance in action.

All information was taken directly from the AQA revision guide with only the key points from B2 5.5.

HideShow resource information
How many pairs of chromosomes do humans have?
23 pairs.
1 of 13
What are sex chromosomes?
A chromosome which carries the information about the sex of an individual.
2 of 13
What do human femals have?
Two X chromosomes (**)
3 of 13
What do human males have?
An X and a Y chromosomes (XY)
4 of 13
What are allels?
Genes that control the same characteristic.
5 of 13
What is the allele called that masks the other?
The dominant allele
6 of 13
What is the allele called that is masked by the other?
The recessive allele.
7 of 13
What do genetic diagrams show?
How allels and characteristics are inherited.
8 of 13
Why are genetic diagrams (biological models) used?
Can be constructed to predict and explain the inheritance of particular characteristics.
9 of 13
What does phenotype mean?
Physical apperance of the characteristic.
10 of 13
What does genotype mean?
The genetic make up - which alleles do you inherit.
11 of 13
What does homozygous mean?
Both allels are the same - DD (dominant) dd (recessive)
12 of 13
what does Heterozygous mean?
The two allels are different.
13 of 13

Other cards in this set

Card 2

Front

What are sex chromosomes?

Back

A chromosome which carries the information about the sex of an individual.

Card 3

Front

What do human femals have?

Back

Preview of the front of card 3

Card 4

Front

What do human males have?

Back

Preview of the front of card 4

Card 5

Front

What are allels?

Back

Preview of the front of card 5
View more cards

Comments

No comments have yet been made

Similar Biology resources:

See all Biology resources »See all DNA and inheritance resources »