Non-mendelian inheritance LESSON 4 SCIENCE

Heredity

Is the passing on of physical or mental characteristics genetically from one generation to another

Gregor johann mendel

He is the father of genetics, he

Gene

Is the basic unit of heredity

Trait

is a feature of an organism

Chromosomes

Are structures within cells that contain a person’s genes

DNA

Is the genetic material that carries the hereditary information

Homozygous

When they have two identical alleles for a gene

Heterozygous

When they have two different alleles for a gene

Punnet square

A graphical representationn for predicting all possible resulting genotype combination of a specific cross or breeding experiment

Incomplete dominance

It is a form of intermediate inheritance in which one allele does not completely dominance other allele. In resulting into a new phenotype

Codominance

Both alleles are expressed equally in the phenotype of the heterozygous

Multiple alleles

When more than two alleles control the inheritance of a character

XX

what is the female sex chromosome?

XY

what is the male sex chromosome

Sex influenced traits

It is expressed in both sexes but more frequently in one sex than in the other

Sex linked traits

Traits that are controlled by genes located on the same sex chromosomes

Sex limited traits

Are expressed exclusively in one sex of the species