Inheritance

Inheritance

5.2

Inheritance

Definition

Inheritance: The transmission of certain characteristics from the parents to the children.

Genes control certain characteristics in an organism.

Allele

Allele: a pair of genes at the same locus

Allele

The characteristics are usually controlled by dominant allele and characteristic from recessive allele will be covered.

Dominant allele - represented by capital letter
Recessive allele - represented by small letter

Genotypes	Example of alleles
Homozygous dominant	TT (normal trait)
Homozygous recessive	tt (very rare trait)
Heterozygous	Tt (normal trait)

Schematic diagram of Mendel's Law

Schematic diagram of sex determination

The father determines the gender of the offspring because:
- Sperm carries sex chromosome x and y while ovum only carries chromosome x

Inheritance

5.2

Inheritance

Definition

Inheritance: The transmission of certain characteristics from the parents to the children.

Genes control certain characteristics in an organism.

Allele

Allele: a pair of genes at the same locus

Allele

The characteristics are usually controlled by dominant allele and characteristic from recessive allele will be covered.

Dominant allele - represented by capital letter
Recessive allele - represented by small letter

Genotypes	Example of alleles
Homozygous dominant	TT (normal trait)
Homozygous recessive	tt (very rare trait)
Heterozygous	Tt (normal trait)

Schematic diagram of Mendel's Law

Schematic diagram of sex determination

The father determines the gender of the offspring because:
- Sperm carries sex chromosome x and y while ovum only carries chromosome x