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ONE SPECIES DIFFER FROM ANOTHER CALLED à INTERSPECIFIC VARIATION
SAME SPECIES DIFFER FROM EACH OTHER  CALLED INTRASPECIFIC VARIATION. TWINS SAME DNA.
REPRESENTATIVE OF THE POPULATION / RELIABLE).SAMPLING BIAS CHANCE
ELIMINATE SAMPLING BIAS/ ELIMINATE HUMAN INVOLVEMENT. RANDOM (SAMPLING).
THE GREATER THE SAMPLE SIZE THE MORE RELIABLE.
TEST ALLOW US TO DECIDE WHETHER ANY VARIATION OBSERVED DUE TO CHANCE OR OTHER.
VARIATION CAUSED BY – GENETIC , ENVIRONMENTAL/BOTH
GENETIC DEFENCES DIFF IN GENES. DIFFERENCES CHANGE FROM GENERATION TO GENERATION.
GENETIC VARIATION CAUSED BY MUTATIONS:
RNADOM CHNAGES TO GENE AND CHROM MAY ,OR MAY NOT BE PASSED ON TO NEXT GENERATION.
MEIOSIS – NUCLEAR DIVISION FORMS THE GAMETES. MIXES UP/ GENETIC INFO COZ IT PASSED DIFF GAMETES.
FUSION OF GAMETES – IN SEXUAL REPRODUCTION. OFFSPRING INHERIT / CHARACTERISTICS OF EACH PARENT
FUSION GAMETES FERTILISATION IS RANDOM PROCESS . CREATE VARIETY OF OFFSPRING.
VARIETY IN ASEXUAL REPRODUCTION VIA MUTATION .
POULATION OF SEXUAL REPRO MORE VARIED.
ENVIRONMENTAL INFLUENCE AFFECT THE WAY GENES ARE EXPRESSED.
THE GENES SET LIMITS BUT THE ENVIRONMENT DETERMINES WHERE LIMITS LIES.
PLANT HAVE TALL GENE , SEED GERMINATION, POOR LIGHT AND LOW SOIL NITROGEN. PLANT SHORT.
ENVIRONMENTAL INFLUENCE ARE / CLIMATIC CONDITIONS.
(E.G. TEMP , RAINFALL , SUNLIGHT) /SOIL CONDITIONS, PH, FOOD AVAILABILITY.
BLOOD GROUP CONTROLLED BY SINGLE GENE.PIE CHART.
CONTINUUM. – CAHARCTERISTIC JOIN TOGETEHR :HEIGHT AND MASS.
(POLYGENE'S) CONTROL HEIGHT MASS.
A BELL SHAPED CURVE – NORMAL DISTRIBUTION CURVE.
SHOW S NUMBER OF PEOPLE IN A PARTICULAR SAMPLE WITH DIFF HEIGHTS.
STANDARD DEVIATION= THE SQUARE ROOT OF THE SUM OF THE MEASURE VALUE – THE MEAN VALUE^2 / THE TOTAL NUMBER ROOF VALUES IN THE SAMPLE.
1. CALCULATE THE MEAN 2. SUBTRACT THE MEAN FORM EACH OF THE VALUES
3. COZ SOME NEGATIVE HAVE TO SQUARE ALL THE NUMBERS.
4. ADD ALL SQUARED NUMBERS TOGETHER. 5.DIVIDE THE TOTAL BY AMOUNT.
REMEMBER TO SQUARE ROOT IN THE END.
DOUBLE HELIX IN DNA RECOGNISABLE.
DNA DETERMINES INHERITED CHARACTERISTICS /HAS A LOT OF INFORM/ IN FORM GENETIC CODE.
DNA MADE FROM : DEOXYRIBOSE, PHOSPHATE GROUP, ORGANIC BASE.
CONDENSATION REACTION BETWEEN A PHOSPHATE GROUP AND A DEOXYRIBOSE SUGAR.
COMBINED DUE TO CONDENSATION REACTION /(MONONUCLEOTIDE
LONG CHAIN MONO NUCLEOTIDE POLYNUCLEOTIDE.
SINGLE RING BASES – CYTOSINE AND THYMINE.
DOUBLE RING BASES – ADENINE AND GUANINE.
DNA MADE OF 2 STRANDS OF NUCLEOTIDES ,(POLYNUCLEOTIDE'S.)
EACH 2 STRANDS LONG, AND JOINED BY HYDROGEN BONDS / BETWEEN BASES.
Created by: ufuoma