GENETICS REVIEWER 2 Flashcards
MODULE 3
GENETIC CHARACTERS ARE CONTROLLED BY UNIT FACTORS THAT EXIST IN PAIRS IN INDIVIDUAL ORGANISMS.
PRINCIPLE OF UNIT FACTORS
TWO UNLIKE FACTORS RESPONSIBLE FOR SINGLE CHARACTER ARE PRESENT IN A SINGLE INDIVIDUAL, ONE UNIT FACTOR IS DOMINANT TO THE OTHER, WHICH IS SAID TO BE RECESSIVE.
PRINCIPLE OF DOMINANCE
DURING GAMETE FORMATION, THE PAIRED UNIT FACTORS SEPARATE OR SEGREGATE RANDOMLY SO THAT EACH GAMETE RECEIVES ONE OR THE OTHER WITH EQUAL LIKELIHOOD.
PRINCIPLE OF SEGREGATION
DURING GAMETE FORMATION, SEGREGATING PAIRS OF UNIT FACTORS ASSORT INDEPENDENTLY OF EACH OTHER.
PRINCIPLE OF INDEPENDENT ASSORTMENT
A UNIT OF HEREDITY; A SECTION OF DNA SEQUENCE ENCODING A SINGLE PROTEIN.
GENE
THE ENTIRE SET OF GENES IN AN ORGANISM
GENOME
ONE OF THE TWO ALTERNATIVE FORMS OF A SINGLE GENE.
ALLELE
AN INDIVIDUAL WITH TWO IDENTICAL ALLELES FOR A GIVEN TRAIT.
HOMOZYGOUS
AN INDIVIDUAL WITH TWO DIFFERENT ALLELES FOR A TRAIT.
HETEROZYGOUS
PHENOTYPE
THE PHYSICAL APPEARANCE OF THE INDIVIDUAL SUCH AS TALL, BLACK, DWARF
GENETIC MAKE UP
GENOTYPE
ALLELE THAT IS EXPRESSED AND IT PREVENTS THE EXPRESSION OF THE OTHER ALLELE WHICH IS SAID TO BE RECESSIVE.
DOMINANT ALLELE
ALLELE THAT IS MASKED OR NOT NOT EXPRESSED IN HETEROZYGOUS CONDITION.
RECESSIVE ALLELE