X and Y chromosomes

Question 1

How many pairs of chromosomes are there in ever human body cell

Answer 1

23

Question 2

What does the 23rd chromosome control

Answer 2

Your sex

Question 3

What chromosome is male and female

Answer 3

XY, XX

Question 4

What do genes you inherit decide

Answer 4

What characteristics you have

Question 5

What are most characteristics controlled by

Answer 5

Several genes interacting

Question 6

What do genes exist in

Answer 6

Alleles

Question 7

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

Answer 7

2

Question 8

What is it called when 2 alleles for that particular gene are the same

Answer 8

Homozygous

Question 9

Homozygous

Answer 9

2 alleles that are the same

Question 10

What is it called when 2 alleles for a specific gene are different

Answer 10

Heterozygous

Question 11

Heterozygous

Answer 11

2 alleles are different

Question 12

What is the allele called if it’s characteristic is shown

Answer 12

Dominant

Question 13

What is the allele called if it’s characteristic doesn’t show

Answer 13

Recessive

Question 14

What must happen for an organism to display a recessive characteristic

Answer 14

Both alleles must be recessive

Question 15

What is your genotype

Answer 15

The combination of alleles you have

Question 16

What is your phenotype

Answer 16

Alleles working together to determine the characteristics you have

Question 17

What is cystic fibrosis

Answer 17

Where the body produces a lot of mucus in the air passages and in the pancreas

Question 18

Is cystic fibrosis recessive or dominant

Answer 18

Recessive

Question 19

What is polydactyly

Answer 19

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

Question 20

Is polydactyly recessive or dominant

Answer 20

Dominant

Question 21

How can embryos be screened for genetic disorders

-during I… embryos are f… in a laboratory and then i… into the mothers w…
-before being implanted it’s possible to r… a cell form each e… and analyse its g…
-genetic d… can therefore be d…

Answer 21

-during IVF embryos are fertilised in a laboratory and the implanted into the mothers womb
-before being implanted it’s possible to remove a cell form each embryo and analyse its genes
-genetic disorders can therefore be detected

Question 22

For and against embryonic screening

For:
-help people to stop s…
-treating d… is very e…
-there are l… to stop it going to f…, eg the parent cannot select the s… of their baby

Against:
-implies people with genetic problems are not wanted
-may lead to everyone wanting to screen their embryos to pick out characteristics
-screening is expensive

Answer 22

For:
-help people to stop suffering
-treating disorders is very expensive
-there are laws to stop it going to far, eg the parent cannot select the sex of their baby

Against:
-implies people with genetic problems are not wanted
-may lead to everyone wanting to screen their embryos to pick out characteristics
-screening is expensive