Mendel's Pea Plant Experiment and Mendelian Concepts, Slides of Genetics

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GENETICS 2021 BIOEDU UMS Erma Musbita Tyastuti

Before Mendel

“BLENDING

THEORY”

Mendel said no!!! One trait is dominant to the other

Pea plants

were chosen

for some reasons

Pea plants characteristics

• (^) Left side are dominant, right side are recessive

Mendel’s Experiment

Before Mendel Hypothesis: Dependent assortment Hypothesis: Independent assortment RRYY rryy Gametes (^) Gametes RRYY rryy RrYy^ RrYy RY^ ry RY^ ry Sperm Sperm RY ry ry

RY

ry Ry ry

RY

RRYY

RrYY RRYy RrYy RrYY rrYY RrYy rrYy RRYy RrYy RRyy Rryy RrYy rrYy Rryy rryy RY ry RY ry Actual results contradict hypothesis Actual results support hypothesis Yellow round Green round Yellow wrinkled Green wrinkled Eggs P generation F 1 generation F 2 generation Eggs

Hukum Mendel

• Law of Segregation during gamete formation allele pairs separate or segregate, into different gametes. Half the gametes carry one allele, and the other half carry the other allele Law of Independent Assortment suggested that each allele pair segregates independently of other gene pairs during gamete formation. What it means: different genes are inherited separately.

http://www.sumanasinc.com/webcontent/anisamples/majorsbiology/independentassortment.html

Law of Dominance Only the dominant characteristics appears when one characteristic of the parent that easily appears (dominant) and one characteristic of the parent that doesn't easily appear (recessive) cross

Monohibrid cross – Test cross

Applying Mendelian Laws

Build up the family pedigrees

Predict the traits of offsprings

Find out the genotypes of a trait

Trace out the parents of a kid