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Genetics Unit Review

Across
The disease caused by uncontrolled division of abnormal cells in a part of the body.
A hybrid that is heterozygous for alleles of two different genes.
When three or more alternative forms of a gene (alleles) occupy the same locus.
The changing of the structure of a gene caused by the alteration of single base units in DNA, or the deletion, insertion, or rearrangement of larger sections of genes or chromosomes. This variant form may be transmitted to subsequent generations.
A word that refers to a particular gene that has identical alleles on both homologous chromosomes.
A diploid cell resulting from the fusion of two haploid gametes.
The set of observable characteristics of an individual resulting from the interaction of its genotype with the environment.
The offspring of parents from the same breed or variety.
A type of cell division that results in two daughter cells each having the same number and kind of chromosomes as the parent cell.
The production or development of an ovum.
Heritable characteristics controlled by genes that are expressed in offspring only when inherited from both parents.
One of the four constituent bases of nucleic acids that is paired with cytosine in double-stranded DNA.
A term that distinguishes the numbered chromosomes from the sex chromosomes. Humans have 22 pairs of ________ chromosomes and 1 pair of sex chromosomes.
A type of cell division that results in four daughter cells each with half the number of chromosomes of the parent cell.
A section of DNA or RNA that determines a certain trait.
The production or development of mature spermatozoa.
Down
A threadlike structure of DNA and protein found in the nucleus of most living cells.
Heritable characteristics controlled by genes that are expressed in offspring who inherited at least one copy from one of their parents.
The production of two identical replicas of DNA from one original DNA molecule.
The number and visual appearance of the chromosomes in the cell nuclei of an organism or species.
A heritable characteristic carried by a sex chromosome.
A heterozygous condition in which both alleles at a gene locus are partially expressed which often produces an intermediate phenotype.
A form of dominance wherein the alleles of a gene pair in a heterozygote are fully expressed.
An enzyme that brings about the formation of a particular polymer, especially DNA or RNA.
A person or organism that has inherited a genetic trait or mutation, but displays no symptoms.
A hybrid that is heterozygous with respect to a specified gene.
The breeding of an individual with a phenotypically recessive individual, in order to determine the genotype of the former by analyzing the proportions of offspring phenotypes.
A genetically determined characteristic.
The recorded ancestry of an organism, person, or family.
The genetic constitution of an individual organism.
Mature haploid male or female germ cells that are able to unite with another of the opposite sex in sexual reproduction to form a zygote.
One of two or more alternative forms of a gene that arise by mutation and are found at the same place on a chromosome.