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Science Words
Practice Science Vocabulary Words
20
Science
7th Grade
04/01/2020

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Term
genetics
Definition
the genetic traits or characteristics obtained from your parents
Term
genome
Definition
a complete set of genes in a human being
Term
genetic inheritance
Definition
a basic principle of genetics that explains how characteristics are passed from one generation to the next
Term
chromosomes
Definition
DNA compactly wrapped around proteins
Term
mutation
Definition
changes that occur to the order of bases appearing in the DNA inside a cell
Term
allele
Definition
each form of a gene
Term
genotype
Definition
the particular combination of alleles that an individual has and that is coded for on the genes
Term
phenotype
Definition
the information contained in the allele determines the outward appearance
Term
punnett square
Definition
is a square diagram that is used to determine the odds or probability of a particular trait being inherited
Term
monohybrid cross
Definition
a breeding experiment between parental generations that differ in a single given trait
Term
genes
Definition
units of hereditary information that contain the instructions for the production of proteins
Term
DNA (deoxyribonucleic acid)
Definition
self-replicating material which is present in nearly all living organisms as the main constituent of chromosomes, and carrier of genetic information
Term
RNA (ribonucleic acid)
Definition
present in all living cells, principal role is to act as a messenger carrying instructions from DNA
Term
heredity
Definition
determined by genetic factors and therefore able to be passed on from parents to their offspring or descendants
Term
proteins
Definition
make up the structure of cells and direct their activities
Term
heterozygous
Definition
a gene having two different alleles of a particular gene or genes
Term
homozygous
Definition
a gene that has identical alleles on both homologous chromosomes
Term
traits
Definition
variations in the genes that one generation passes down to the next, such as size, build, coloring, and your body’s health
Term
dominate
Definition
the phenomenon of one variant of a gene on a chromosome masking or overriding the effect of a different variant of the same gene on the other copy of the chromosome
Term
recessive
Definition
a gene that can be masked by a dominant gene
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