Chapter #10 – Section 2: Mendelian Genetics

heredity
The passing of traits to the next generation
-Inheritance

gregor mendel
Father of genetics

self-fertilization
The fusion of a male and female gamete in the same flower

recessive allele
Type of allele that is hidden by the expression of the other phenotype

dominant allele
Type of allele that is visible by the expression of the other phenotype

cross-pollination
To breed one plant with another

gametes
Male and female sex cells

true-breeding
To consistently produce offspring with only one form of a trait

genetics
The science of heredity

allele
An alternative form of a single gene passed from generation to

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generation

homozygous
An organism with two of the same alleles for a particular trait

heterozygous
An organism with two different alleles for a particular trait

genotype
An organism’s allele pairs (Ex: RR and Rr)

phenotype
The observable characteristic or outward expression of an allele pair (yellow or round)

law of segregation
Law in which two alleles for each trait separate during meiosis

monohybrid cross
A cross that involves hybrids for a single trait

law of independent assortment
Law in which a random distribution of alleles occurs during gamete formation

hybrid
Another word for heterozygous organism

punnett square
Item used to predict the possible offspring of a cross between two (or more) known genotypes

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