Flashcards in Deck 8 Deck (30)
sickle cell trait
symptoms shown by those possessing a heterozygous genotype for sickle cell anemia
combined effect of two or more genes on a single character
Two separate genes control one trait, but one gene masks the expression of the other gene
single genes can affect multiple characteristics
inherited disorder in which the infant lacks a liver enzyme
Referring to a phenotypic character that is influenced by multiple genes and environmental factors.
norm of reaction
The range of phenotypes produced by a single genotype, due to environmental influences.
22 chromosome pairs that control traits NOT related to gender--same in females and males.
A chromosome that is not directly involved in determining sex, as opposed to a sex chromosome.
A display of the chromosome pairs of a cell arranged by size and shape.
Abnormal number of chromosomes
condition of premature old age occuring in childhood
in a nucleic-acid chain, a subunit that consists of a sugar, a phosphate, and a nitrogenous base
DNA segments that serve as the key functional units in hereditary transmission.
type of RNA molecule that transfers amino acids to ribosomes during protein synthesis
type of RNA that combines with proteins to form ribosomes
Process by which mRNA is decoded and a protein is produced
double-ring nitrogenous base
single-ring nitrogenous base
tumor suppressor gene
a gene that codes for regulator proteins that prevent the cell from undergoing uncontrolled division
the change over time in populations of related organisms
evolutionary change within a species or small group of organisms, especially over a short period.
large-scale evolutionary changes that take place over long periods of time
differences that are passed on from parent to offspring
A trait that helps an organism survive and reproduce
The process in which DNA makes a duplicate copy of itself.
An enzyme that catalyzes the formation of the DNA molecule.
method of replication that implies that each new strand of DNA is half original and half new
the strand of DNA that specifies the complementary mRNA molecule