Inheritance

Question 1

Where are the chromosomes

Answer 1

In the nucleus

Question 2

What is dna

Answer 2

DNA is a long list of chemical instructions on how to build an organsim

Question 3

What is a gene

Answer 3

A gene is a short section of a chromosome each chromosome contains many genes and genes are also made up of dna

Question 4

What’s works in pairs

Answer 4

Chromosomes

Question 5

How many chromosomes do humans have

Answer 5

46 chromosomes (23 pairs)

Question 6

Define heredity

Answer 6

The process by which genes re passed down from parents

Question 7

When and who made the first model of DNA

Answer 7

1953 by crick and Watson they discovered that dna is in the shape of a double helix

Question 8

What is a distribution curve

Answer 8

A line that goes through the middle/top of most bars and it needs to be a smooth curve

Question 9

What is a continuous variation

Answer 9

Can vary over a range of values eg height

Question 10

What is a discontinuous variation

Answer 10

Can only take certain vales eg blood groups and eye colour

Question 11

How do you get characteristic features

Answer 11

Characteristic features can be inherited or environmental

Question 12

What are the 23rd pair of chromosomes labelled

Answer 12

Xy or xx which determines your gender

Question 13

Are egg cells x or y

Answer 13

X and a sperm carries either an x or a why the y carrying male characteristics and the x female

Question 14

Homozygous

Answer 14

The 2 alleles are the same

Question 15

Heterozygous

Answer 15

If the 2 alleles are different

Question 16

Genotype definition

Answer 16

The mix of allels you have

Question 17

Phenotype

Answer 17

The characteristics you have

Question 18

What is an allele

Answer 18

An allele is one of 2 or more versions of a genetic sequence at a particular region of a chromosome

Question 19

Name 2 inherited disorders

Answer 19

Cystic fibrosis ( build up of mucus ) but it is recessive
Polydactyly( extra digit) and is dominant