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Chapter 3 Vocabulary

Hereditary and Enviroment
Across
The observable characteristics of a person
A condition in which a person has 47 chromosomes instead of the usual 46
semen
A person whose genotype includes a gene that is not expressed in the phenotype
a fatal central nervous system disorder caused by a genetic miscode
The inability to conceive after at least a year of trying to do so via sexual intercourse
the phenomenon of one variant of a gene on a chromosome masking or overriding the effect of a different variant of the same gene
a classification of blood, based on the presence and absence of antibodies and inherited antigenic substances on the surface of red blood cells
A Reproductive cell
Down
a cluster of distinct characteristics that tend to occur together
One of the 46 molecules of DNA that each cell of the body contains
A genetic disorder in which a child’s body is unable to metabolize an amino acid called phenylalanine
a gene that is unlikely to appear is called
A statistic that indicates what percentage of the variation in a particular trait within a particular population, in a particular context and era, can be traced to genes
Referring to a gene carried on the X chromosome
The single cell formed from the fusing of two gametes
A condition in which an organ- ism has a mixture of cells, some normal and some with an odd number of chromo- somes or a series of missing genes
Any of the possible forms in which a gene for a particular trait can occur
single cell released from either of the female reproductive organs
A Section of a chromosome and the basic unit for the transmission of heredity