1. Genetic Inheritance Self Manager Reflective Learner Effective
L.O: To understand how genetic inheritance occurs
MUST: Recognise patterns of inheritance using one gene but appreciate that many characteristics are the result of multiple genes.
SHOULD: Recognise examples of inherited traits, genotypes and phenotypes. Use a simple diagram to state how offspring have inherited traits.
COULD: Use the terms allele, dominant, recessive, homozygous, and heterozygous correctly. Describe a phenotype when given the genotype. Use a Punnett square diagram to predict the outcome of a
monohybrid cross.
Self
Manager
Reflective
Learner
Effective
Participator
Team
Worker

2. Literacy Starter 1. Unscramble the key words: NEEG LUSCUNE MAGEETS
HOOOMMCRSE
MAGEETS
2. Match the key word with the correct meaning:
GENE
Humans have 23 pairs found in the nucleus of cells
Contain half the genetic information needed to make a new organism.
CHROMOSOME
GENE – NUCLEUS – CHROMOSOME – GAMETES; GENE-3, CHROMOSOME – 1, GAMETES - 2
GAMETES
A section of DNA that codes for a characteristic
3. Make three sentences using these nine words. Choose one word from each box.
DNA
CELL
SEXUAL REPRODUCTION
SPERM
GENES
VARIATION
EGG
CHROMOSOMES
GAMETES

3. MID – HIGH LEVEL

4. LOWER LEVEL

5. A gene (found on chromosomes) codes for a particular characteristic, e
A gene (found on chromosomes) codes for a particular characteristic, e.g. eye colour.
Most body cells have two copies of each gene (one from the mother, one from the father).
When gametes (sex cells) are made, only one copy is passed on, so when a sperm fertilises an egg there will be two copies.

6. So how do we get variation?
Each gene can have different versions called alleles.
Dominant alleles only need one copy for the feature to be expressed.
Recessive alleles need two copies for the feature to be expressed.

7. Representing genes There are two alleles for eye colour, B and b.
B is dominant to b.
B codes for brown eyes.
b codes for blue eyes.
Genotype: bb
Phenotype: Blue eyes
Homozygous: alleles are the same
Genotype: BB
Phenotype: Brown eyes
Homozygous: alleles are the same
Genotype: Bb
Phenotype: Brown eyes
Heterozygous: alleles are different

8. Team Worker Effective Participator
Activity
Complete the card sort activity
Words you are aiming to match:
ALL: gene, allele, nucleus, gametes, inherited
MOST: PLUS dominant, recessive
SOME: PLUS up to 4 others
Team
Worker
This can be done as a card sort, colour code activity (jumbled up table is below the answers in the word document)
Effective
Participator

9. ANSWERS ALL – MOST - SOME Gene
Short section of DNA that codes for a characteristic
Homozygous
 A pair of matching/ identical pair of alleles
Heterozygous
A pair of alleles that are different
Inherited
Passed on from parents
Nucleus
Structure in cell that contains the genetic information to make more cells
Dominant allele/gene
The stronger form of a gene
Recessive allele/gene
The weaker form of a gene
Gametes
The sex cells ( egg and sperm)
Genotype
The allele combination that a person has
Phenotype
The features that a person has
Allele
A version of a gene

10. Mandy and Dave Mandy has brown eyes (phenotype)
She has two dominant alleles, BB (genotype)
We say this is homozygous as the alleles are the same type
Dave has brown eyes (phenotype)
He as one dominant and one recessive gene, Bb (genotype)
We say this is heterozygous as the alleles are different

11. Eggs Sperm B B B b B B B b B B B b
Lets have a look at what colour eyes their children have
Eggs
Sperm B B B b B B B b B B B b

12. Drawing a genetic cross
Mandy – BB
Dave - Bb
Eggs  B B 
BB   b
 Bb
Bb 
Sperm
Genotypes: BB Bb
Phenotypes: Brown eyes Brown eyes
Chance of their child having brown eyes = 100%
Chance of their child having blue eyes = 0%

13. Self Activities Manager LOW LEVEL: Inheritance Card Game
MID LEVEL: Inheritance Card Game including student follow up
HIGH LEVEL: ‘Genetic Crosses’ & ‘More Genetic Crosses’
Taking it further: Genetic crosses with co-dominance
Cards need to be cut out ready for low level activity

14. Genetic Inheritance Self Manager Reflective Learner Effective
L.O: To understand how genetic inheritance occurs
MUST: Recognise patterns of inheritance using one gene but appreciate that many characteristics are the result of multiple genes.
SHOULD: Recognise examples of inherited traits, genotypes and phenotypes. Use a simple diagram to state how offspring have inherited traits.
COULD: Use the terms allele, dominant, recessive, homozygous, and heterozygous correctly. Describe a phenotype when given the genotype. Use a Punnett square diagram to predict the outcome of a
monohybrid cross.
Self
Manager
Reflective
Learner
Effective
Participator
Team
Worker

15. Pupil – Teacher - Talk Reflective Learner Pupil
LOW: Define the term ‘gene’ and ‘allele’, use the word ‘DNA’ in your answer
MID: Describe what ‘dominant’ and ‘recessive’ mean
HIGH: Eggs=Hh Sperm=Hh, draw a genetic cross
Teacher comment
Pupil response