7th Grade Genetics Test
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| Allele | alternate form of the same gene.
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| Carrier | an individual that carries one gene for a recessive trait. A carrier does not express that trait, but when mated with another can produce offspring that do.
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| Chromosome | a thread-like strand in the nucleus that controls the cell activity and carries the genetic material to pass traits to offspring.
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| Co-dominant | 2 alleles of a gene pair in a heterozygote that are both fully expressed.
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| Dominant Gene | strong form a a gene, which is expressed even if a recessive gene is present.
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| Gamete | sex cell
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| Gene | a unit of genetic material that determines a trait.
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| Genetics | the scietific study of genes/inheritance.
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| Heredity | the pasing of physical characteristics from parent to child.
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| Heterozygous | having 2 different alleles for a trait. (also known as hybrid)
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| Homozygous | having 2 of the same alleles. (also known as pure bred)
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| Hybrid | having 2 different alleles for a trait (also know as heterozygous)
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| Incomplete Dominance | a condition tht results when genes produce a trait somewhere in between the traits of the parents.
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| Inherit | to acquire a triat from your parents
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| Karyotype | a picture of a person's chromosomes
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| Meiosis | cell division that happens in sex cells only. produces gametes have one set of unpaired chromosomes.
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| Gregor Mendel | Austrian monk who studies pea plants and figured out the rules of heredity. The "father" of genetics.
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| Mutation | a change in DNA or chromosomes
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| Pedigree | a line of anchstors; visual representation.
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| Phenotype | The actual characteristics that an organism demonstrates
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| Polygenic | a trait that requires more than one gene
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| Probability | The percent chance of inheriting a trait
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| Punnet Square | a visual diagram that demonstrates the possible genotypes person could inherit from the parents.
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| Pure bred | having 2 of the same alleles. (also known as homozygous)
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| Ratio | relation in degree or number between two different things
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| Recessive Gene | the weak form of a gene, which is not expressed when the dominant form is also present.
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| Sex-linked trait | A recessive trait carried on the X chromosome.
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| Trait | genetically determined characteristic
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You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
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