Genetics:From Proteins to Mendel 1

Genetics:From Proteins to Mendel 2

Students will work in pairs.

Each student picks up a set of 4 x 2 chromosomes and a coin

The chromosomes are in different colours and present different alleles.

Each student writes on a sheet the phenotype and the genotype.

Students simulate meiosis by tossing a coin. If heads, take number , if tails number ‘

Each student takes the simple chromosome and matches it with their partner’s simple chromosome.

Read the new set of 4 x2 chromosome and write the new baby phenotype and genotype

Repeat (all) the process again at least three times (for three children)

PROCEDURE

Genetics:From Proteins to Mendel 3

GENOTYPE 1 GENOTYPE 2 GENOTYPE 3 SEX HEMOPHILIA

FATHER’SGAMETES

MOTHER’S GAMETES

CHILD 1

CHILD 2

CHILD3

CHILD 4

FAMILY X1X1/X1Y1

Genetics:From Proteins to Mendel 4

Eye colour

Hair colour

Five fingers

Genetics:From Proteins to Mendel 5

iiiiII .. XX

Nucleous

Genetics:From Proteins to Mendel 6

.. //XXII.. //XXII

II // XX

Genetics:From Proteins to Mendel 7

Genetics:From Proteins to Mendel 8

nn

nn2n

Genetics:From Proteins to Mendel 9

Traits:Rolling Tongue: dominant (R)/recessive (r) allele

Blood Groups: Multiple allele serie

A, B, AB, O IA IB i IA = IB Codominance IA > i and IB > i

Skin Colour: Intermediate expression

Light/Dark/Middle

Sex: Girl or Boy

Haemophilia XH Sex linked traitGenetics:From Proteins to Mendel 10

Genetics:From Proteins to Mendel

1’

rr

1

ARARR r

Autosomes 1 and 1’

11

Genetics:From Proteins to Mendel

1’

rr

1

ARARr R

12

Genetics:From Proteins to Mendel

II

IIIIIA, IB or iIA , IB or i

2 2’

Autosomes 2 and 2’

13

Genetics:From Proteins to Mendel

DDD d

3 3’

Autosomes 3 and 3’

14

Genetics:From Proteins to Mendel

DDd D

3 3’

Autosomes 3 and 3’

15

Genetics:From Proteins to Mendel

Sex Chromosome or Heterochromosomes: Male

16

Genetics:From Proteins to Mendel

Sex Chromosomes or Heterochromosomes: Female

17

Genetics:From Proteins to Mendel

Sex- linked traits (haemophilia)

XH

18