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Chapter 3 Genetics and Heredity

Horizontales
Two genetic endowment inherited by an individual
Siblings who share the same womb at the same time but originate from two different eggs fertilized by two different sperm cells
Tests performed on a women's blood to determine whether the fetus she is carrying has an increased risk for some types of chromosomal and metabolic disorders
Children seek out environmental compatibility with their gametes
Method of sampling fetal chorionic cells
Gamete cell division (23 chromosomes)
Two individuals who originate from a single zygote, which early in cell division separates to form two separate masses
Proportion of variability in the phenotype that is estimated to be accounted for by genetic influences within a known environmental range
Parents transmit traits through genes, environment, or both
Verticales
Stable, early-appearing constellation of individual personality attributes believed to have a hereditary basis
More than one gene affecting the trait
Procedures designed to provide unequivocal answers about the presence or absence of a prenatal problem
Method of withdrawing blood from the umbilical cord of the fetus
Study of how characteristics and behaviors of individuals, such as intelligence and personality, are influenced by the interaction between genotypes and experiences
Method of sampling the fluid surrounding the developing fetus through insertion of a needle
Normal cell division