CHANCE, PROBABILITIES, AND GENETIC RATIOS

CHANCE

• central role in Mendelian genetics• union of gametes during fertilization process• is a random process

• probability is the measure on how a particular event will happen

PROBABILITY

• given a value between 0 (0% chance or it will not occur) and 1 (100% chance or it will occur)

• the higher the degree of probability the more likely the event is to happen

GENETIC RATIO

• representation of genotypes of a pair of contrasting traits of a character in the form of ratio– homozygous dominant– heterozygous– homozygous recessive

Percent Deviation

• useful in determining how accurate the data collected by student

• Percent deviation = (student data - lab data) / lab data then multiplied by 100

• if negative (student data is lower than lab data)• if positive (student data is higher than lab data)

STATISTICAL CONCEPTS AND RULES

Mean, Variance, and Standard Deviation

• Pick 10 leaves from the samples• measure (in mm) the length and broadest

width of the leaf• Obtain measurements by other groups• Compute for sample mean, sample variance,

sample standard deviation• Plot frequency against the measure value to

prepare histograms