Bio wawawa

PLs

Homologous chromosomes

Refer to a pair of chromosomes that are of the same size

Alleles

One of two ore more alternative forms of gene

Genotype

Totality of the genetic makeup of an individual

Phenotype

Refers to the observable expression of a particular genotype

Homozygous

Refers to when two similar alleles are present in a pair

Heterozygous

When two different alleles are paired

Dominant allele

The allele that is expressed in a heterozygous condition

Recessive allele

Allele that is not expressed in the a heterozygous condition

Gregor Mendel

Illustrated the basic pattern of inheritance

Genes

The factors of inheritance

Dihybrid cross

2 different traits with contrasting alleles will be traced at a time.

Law of independent assortment

States that a pair of alleles wil segregate or assort indepently from other alleles during gamete formation

Unit factors in pairs

Genetic characters are controlled by unit factors that exist in pairs in individual organisms

Dominance and recessiveness

When two unlike unit factors responsible for a single trait are present in an individual, one unit factor is dominant over the other, which is said to be recessive

Law of segregation

During the formation of gametes, the paired unit factors segregate randomly so that each gamete receives one or the other with equal likelihood

Codominance

When two dominant alleles are present, both alleles will be expressed when combined

Recessive

Codominance happens when the _____ gene is missing

Incomplete dominance

When dominant alleles are absent, only a recessive allele will combine with another recessive allele

Dominant

Incomplete dominance appears when the ___ gene is missing

Lethal gene

A condition when a certain combination of alleles will result to death of the carrier

Multiple alleles

When more than two alleles exist in a certain character

Agglutinogens

IN humans are used as the most common means of blood typing

Polygenic inheritance

Traits that are caused by the presence of more than one gene

Polygenes

Genes that are involved in polygenic inheritance

Rhesus Factor

The positive or negative sign in blood groups is known as ______