3/9/2016

DEPARTMENT OF BIOTECHNOLOGY

NATURE V/S NURTUREUnder the guidance of

DR.C.K.RAMESHAssociate Professor & Chairman

Department of BiotechnologySahyadri Science college (Auto)

Shimogga.

Submitted bySACHIN.H16BT024

I Msc BiotechnologySahyadri Science College (Auto)

Shimogga.

SEMINAR ON

10/9/2016

Nature ?

Nature v/s Nurture ?

Nurture ?

ENVIRONMENTAL EFFECTS AND GENE EXPRESSION

1) Temperature

Himalayan Rabbit Siamese cat

Expression of the lobe gene in different individuals in Drosophila melanogaster.

2) Light

Face Freckling

Albino Corn Plant

3) Nutrition

4) Sex

Genetic trait Usual age of onset

Blood group antigens prenatalAlkaptonuria (darkening of urine) Birth

Icthyosis (sex linked) Birth 4-monthsNephrotoxic infantile cystinosis 6-18 months

Vitamin D resistant rickets 1 yearsProgeria (premature aging) 1-2 yearsSevere muscular dystrophy 2-5 yearsJuvenile amaurotic idiocy 5-10 years

Periodic paralysis 10 yearsRotor syndrome (mild jaundice) 12-18 years

Pattern baldness 20-30 yearsPolycystic kidney disease (adult) 30-40 years

Gout 30-50 yearsDiabetes mellitus (adult form) 40-60 years

Alzheimer’s Disease (senile dementia)

50-60 years

5) Age

PHENOCOPY

1) Phocomelia

An environmentally caused trait that appears to be inherited.

Phocomelia is rare genetic disorder whose effects are mimicked by the tetratogen,Thalidomide.

2) Diabetes mellitus

TWIN STUDIES

CONCORDANCE – DISCORDANCEPhenotype/ Trait Identical twins Fraternal twins

Concordance In %

DiscordanceIn %

ConcordanceIn %

DiscordanceIn %

Beginning of sitting up 82 18 76 24Beginning of walking 68 32 31 69

Hair colour 89 11 22 78Eye colour 99.6 0.4 28 72

Blood pressure 63 37 36 64Handedness (left or right) 79 21 77 23

Diabetes mellitus 65 35 18 82Paralytic polio 36 64 6 94

Rickets 88 12 22 78Stomach cancer 27 73 4 96

Mammary cancer 6 94 3 97Cancer of uterus 6 94 0 100

Feeblemindedness 94 6 47 53Schizophrenia 80 20 13 87

Down syndrome 89 11 7 93Criminality 68 32 28 72

Smoking habit 91 9 65 35Alcohol drinking 100 0 86 14Coffee drinking 94 6 79 21

Hansen disease (leprosy) 83 17 17 83

IDENTICAL TWINS REARED APART

TraitIdentical twins

Fraternal twins SiblingsRearedtogether

Rearedapart

Height (cm) 1.7 1.8 4.4 4.5

Weight (lb) 4.1 9.9 10.0 10.4

Head length(mm) 2.9 2.2 6.2 -

Head width (mm 2.8 2.9 4.2 -

Intelligence (Binnet IQ score points)

5.9 8.2 9.9 9.8

Average differences between identical and fraternal twins

NATURE, NURTURE AND INTELLIGENCE

Factors affecting intelligenceSize of the familyBirth orderEarly Development MotherDietary Effects

VARIATION WITHIN PLANT POPULATIONS

Classification

Potentilla glandulosa

Kingdom Planate

order Rosales

Family Rosaceae

Genus Potentilla

Species p.glandulosa

Growth responses by Potentilla glandulosa grown at three elevations

CONCLUSION

&

Thank You…