Genetic Diagrams

Question 1

What do genes you inherit control

Answer 1

The characteristics you’ll develop

Question 2

How many genes are most characteristics controlled by?

Answer 2

Several genes interacting

Question 3

What do genes exist in

Answer 3

Different versions called alleles

Question 4

How many alleles of every gene do you have in your body

Answer 4

2

Which is one on each chromosome in a pair

Question 5

What is a homozygous pair

Answer 5

An organism has 2 alleles for a particular gene that are the same

Question 6

What is a heterozygous pair

Answer 6

If an organisms 2 alleles for a particular gene are different

Question 7

What is the allele for a characteristic that’s shown called

Answer 7

The dominant allele

Question 8

What is the oether allele called in a heterozygous pair that is not the dominant allele

Answer 8

The recessive allele

Question 9

What must both alleles be to show the recessive characteristic

Answer 9

Both alleles must be recessive

Question 10

What must the alleles be to display the dominant characteristic

Answer 10

The organism must have at least 1 dominant allele as it can overrule the recessive allele

Question 11

What is your genotype

Answer 11

The combination of alleles you have

Question 12

What is your phenotype

Answer 12

The molecular level your alleles work at to determine what characteristics you have

Question 13

What is cystic fibrosis cause by

Answer 13

A recessive allele

Question 14

What is cystic fibrosis

Answer 14

A genetic disorder of the cell membranes resulting in the body producing a lot of thick sticky mucus in the air passages and in the pancreas

Question 15

What type of disorders can be inherited

Answer 15

Cystic fibrosis

Polydactyly

Question 16

What the polydactyly caused by

Answer 16

A dominant allele

Question 17

What is polydactyly

Answer 17

A genetic disorder where a baby’s born with extra fingers or toes

Question 18

Because it’s a dominant allele what does this mean for the child of a person who has the disorder

Answer 18

There’s a 50% chance of the child having the condition

Question 19

How can genetic disorders be detected

Answer 19

During ivf treatment before the embryo is implanted into the mother womb it’s possible to remove w cell from each embryo and analyse is genes

Question 20

What are the ethical economical and social concerns about embryo screening

Answer 20

Embryos produced by ivf - embryos with bad alleles would be destroyed
Embryos in the womb - screening could lead to decision to terminate the pregnancy

Question 21

What are argument for embryonic screening

Answer 21

Helps stop people suffering
Will decrease the amount of money spent
Laws to stop it going too far

Question 22

Arguments against embryonic screening

Answer 22

Implies people with genetic problems are undesirable
May come to a point where everyone wants to do it for desirable characteristics
It’s expensive