TABLE OF CONTENTS
PATTERNS OF INHERITANCE 1
Terminologies 1
Punnett Square 2
MENDELIAN PATTERNS OF INHERITANCE 2
NON MENDELIAN PATTERNS OF INHERITANCE 3
Principle of Incomplete Dominance 3
Codominance 4
Principle of Multiple Alleles 5
Sex Linked Traits 6
PATTERNS OF INHERITANCE
Heredity - natural process by which traits are passed on from parents to offspring,
either through sexual or asexual reproduction
Gregor Johann Mendel (1822-1844)
- born July 22, 1822 in Austria
- died January 6, 1884
- father of heredity
- his works served as the foundation of the modern principles of genetics
- worked with varieties of pea plants to establish a principles and laws that will
explain the pattern of trait inheritance among organisms
TERMINOLOGIES
Allele
- member of each pair of genes
- occupies the same locus
Dominant allele
- masks the effects of a recessive allele if two are paired together on a gene
Recessive allele
- expression is masked if dominant allele is present
Homozygous *written in both uppercase (dominant) or both lowercase (recessive)
- having two identical alleles of a particular gene
Heterozygous (*1st letter uppercase, 2nd lowercase)
- having two different alleles of a particular gene
PATTERNS OF INHERITANCE 1
Terminologies 1
Punnett Square 2
MENDELIAN PATTERNS OF INHERITANCE 2
NON MENDELIAN PATTERNS OF INHERITANCE 3
Principle of Incomplete Dominance 3
Codominance 4
Principle of Multiple Alleles 5
Sex Linked Traits 6
PATTERNS OF INHERITANCE
Heredity - natural process by which traits are passed on from parents to offspring,
either through sexual or asexual reproduction
Gregor Johann Mendel (1822-1844)
- born July 22, 1822 in Austria
- died January 6, 1884
- father of heredity
- his works served as the foundation of the modern principles of genetics
- worked with varieties of pea plants to establish a principles and laws that will
explain the pattern of trait inheritance among organisms
TERMINOLOGIES
Allele
- member of each pair of genes
- occupies the same locus
Dominant allele
- masks the effects of a recessive allele if two are paired together on a gene
Recessive allele
- expression is masked if dominant allele is present
Homozygous *written in both uppercase (dominant) or both lowercase (recessive)
- having two identical alleles of a particular gene
Heterozygous (*1st letter uppercase, 2nd lowercase)
- having two different alleles of a particular gene
