Flashcards in Chapter 4 Deck (26)
In a population, the percentage of the alleles at a locus accounted for by one specific allele
Characteristics that are influenced by alleles at one genetic locus. (Sickle cell anemia and Ray Sachs Are correlated to these traits)
Large molecules found on the surface of cells. Several different loci govern various antigens on red and white blood cells
Small changes occurring within species such as changes in allele frequencies
The expression of two alleles I heterozygotes. In this situation neither allele is dominant or recessive, so they both influence the phenotype.
A diagram hoeing family relationships. It's used to trace the hereditary pattern of particular genetic (usually Mendelian) traits
Molecules that influence the color of skin hair and eyes
A trait governed by an allele that's express in the prescience of another allele. Prevent the expression of recessive alleles in heterozygotes
The observable physical characteristics of an organism, frequently influenced by environmental factors
A situation where the action of one gene affects several different traits
A type of genetic drift in which allele frequencies are altered in small population that are taken from larger populations or are remnants of the latter
A type of mutation that causes the replacement of a single base nucleotide with another nucleotide of the genetic material, DNA or RNA.
Exchange of genes between populations
Referring to traits influenced by genes at two or more loci. Ex. Are stature, skin color, eye color, and hair color. Often influenced by environmental factors such as nutrition and exposure to sunlight
All of the genes shared by the reproductive members of a population
Within a species a community of individuals where mates are usually found
Evolutionary changes or changes in allele frequencies produced by random favored in small populations. Is a result of small population size.
Principle of independent assortment
The distribution of one pair of alleles into gametes does not influence the distribution of another pair l. The genes controlling different traits are inherited independently of one another
The genetic makeup of an individual. Refers Ronan organisms genetic makeup at a particular locus
The genetic makeup
Of a cell, an organism/individual usually with reference to a specific characteristic under consideration
Principle of segregation
Genes occur in pairs because chromosomes occur in pairs. During gamete formation, the members of each pair of alleles separate so that each gamete contains one member of each pair
Having different alleles at the same locus on members of a pair of chromosomes
Changes produced only after many generation such as the appearance of new species
Shirt adjacent segments of DNA within a gene that are repeated several times
In genetics inherited differences among individuals, the basis of all evolutionary change.