Inheritance/Genetic Disorders

Question 1

Who discovered heredity?

Answer 1

Gregor Mendel

Question 2

A dominant allele is represented by…

Answer 2

capital letter

Question 3

A recessive allele is represented by…

Answer 3

lower case letter

Question 4

What is a punnett square?

Answer 4

Determines genotypes

Question 5

How many alleles come from parents?

Answer 5

1 from mother and 1 from father

Question 6

Is a dominant or recessive allele more powerful?

Answer 6

Dominant

Question 7

What does heterozygous mean?

Answer 7

Two different alleles e.g. Mm

Question 8

What does homozygous mean?

Answer 8

Same alleles e.g. MM

Question 9

How is there a better chance of IVF being successful?

Answer 9

More than one egg is fertilised

Question 10

What is the process of IVF in two points?

Answer 10

1) Before being implanted, it’s possible to remove a cell from each embryo
2) Genes are analysed which detects genetic disorders

Question 11

What happens to the embryos with alleles?

Answer 11

Implanted into mother

Question 12

What happens to the embryos with bad alleles?

Answer 12

Destroyed

Question 13

3 reasons for embryo screening:

Answer 13

1) Stops people suffering
2) Most of embryos are destroyed anyway - only one is left healthy
3) Laws to stop people wanting babies for ‘desirable’ reasons e.g. blonde hair, blue eyes

Question 14

3 reasons against embryo screening:

Answer 14

1) Expensive
2) Rejected embryos are destroyed which could have been potential human life
3) Prejudice - implies people with genetic problems are ‘undesirable’