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Biology Unit 5 Vocab A

Across
An offspring from a cross between parents which has different phenotypes for a specific trait.
A reproductive cell produced by the male or female parent, which contains the haploid number of chromosomes.
Refers to a pair of genes in an organism which are identical in the way they influence a trait.
A giant molecule consisting of the sugar deoxyribose, phosphates and nitrogen bases; contain the coded genetic information.
A nucleic acid similar to DNA using ribose for the sugar and the nitrogen base uracil in place of thymine.
In a pair of genes, one may prevent the allele from being expressed.
A genetic characteristic of the individual.
A five-carbon sugar.
A type of cell division used to produce gametes and there is a reduction in the chromosome number from the diploid to the haploid number.
The outward appearance of the organism which is the product of gene action.
A phenotype (trait) resulting from homozygous genes from the offspring of true breeding.
Down
The part of the life cycle of a cell where the cell divides into two exact copies of the original cell.
A "threadlike" structure in the nucleus, composed of DNA, and contains the heredity information for the organism.
Variation from the predicted values.
The chance that a given event will occur usually expressed between the number 0 (will not occur) and 1 (the event will occur).
The genes present in an organism.
A gene or trait which is masked when a dominant allele is present.
Alternative forms for a specific gene.
A portion of DNA which codes a specific hereditary trait.