inheritance - yr11/yr10

Question 1

what is cybric fibrosis?

Answer 1

an inherited disease that builds up mucus in the lungs which causes struggling to breathe because of the build up of mucus therefore needing to exercise to get rid

Question 2

what is polydactyl disease

Answer 2

a genetic disease which causes someone to have extra toes or fingers, which can be cut off optionally

Question 3

what is a dominant allele

Answer 3

Dominant alleles are represented by a capital letter, for example you could use a B. The allele for brown eyes, B, is dominant.

Question 4

what is a recessive allele

Answer 4

A type of allele that when present on its own will not affect the individual.

Question 5

what is a gamete

Answer 5

a gamete is a sex cell. In humans, gametes are sperm and eggs

Question 6

what is DNA

Answer 6

it determines the characteristics of a living organism

Question 7

what is a chromosome

Answer 7

they are contained inside the nucleus they are always made of many genes

Question 8

what is a gene

Answer 8

small sections of DNA on a chromosome that code for a particular sequence of amino acids

Question 9

what is an allele

Answer 9

different versions of the same gene. For example, the gene for eye colour has an allele for blue eye colour and an allele for brown eye colour.

Question 10

what is a genotype

Answer 10

The genotype
is the collection of alleles that determine characteristics and can be expressed as a
phenotype

Question 11

what is homozygous?

Answer 11

alleles are both identical for the same characteristic, for example AA or aa.

Question 12

what is heterozygous?

Answer 12

alleles are both different for the same characteristic, for example Aa

Question 13

what is the male symbol?

Answer 13

XY

Question 14

what is the female symbol

Answer 14

XX