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Chapter 3

Group 4
marshell, cody, jenn
Horizontales
the genes inherited from each parent are the same
a result of the interaction between several genes, such as eye color
occurs when a child inherits too many or two few chromosomes
occurs in 1 of every 2,500 live female births when an ovum which lacks a chromosome is fertilized by a sperm with an X chromosome
a result of many genes
Verticales
this cell, containing the combined genetic information from both parents
the child inherits a gene from one parent but not the other
a portion of a DNA that serves as the basic unit of heredity
the first chance of survival outside the womb
occurs in 1 out of 700 live male births and results when an ovum containing an extra X chromosome is fertilized by a Y sperm
refers to the features that are actually expressed
a process in which segments of the chromosomes from each parent form pairs and genetic segments are exchanged as determined by chance
refers to the sum total of all the genes a person inherits
means that many different genes contribute to a final outcome
Beginning at puberty, one ovum ripens and is released about every 28 days
a result of many factors, both genetic and environmental
process in which the male gametes are produced in the testes
threadlike structures of nucleic acids found in the nucleus of most living things