B2 5.5: Inheritance in action.

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Created by: JSpencer
Created on: 29-02-16 08:28

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.

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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

Card 4

Front

What do human males have?

Back

Card 5

Front

What are allels?

Back

View more cards

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B2 5.5: Inheritance in action.