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Introduction to Genetics (Ch 11)

Name:________________________
Class: ___________ Date: ________
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Across
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A gene with more than two alleles is said to have ______ alleles.
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A cell that contains only a single set of chromosomes is said to be _______.
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An organism with a ______ allele for a particular form of a trait will exhibit that form only when the dominant allele for the trait is NOT present.
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An example of codominance is when chickens are _____ with both black and white feathers.
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Organisms that have two different alleles for the same gene such as Tt are _______.
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The process in which the number of chromosomes per cell is cut in half through the separation of homologous chromosomes.
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Chromosomes in which one set comes from the male parent and one set comes from the female parent.
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An example of a gene with multiple alleles is the human gene for _______ type.
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The principle of independent ______ states that genes for different traits can segregate independently during the formation of gametes.
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During sexual reproduction, male and female reproductive cells join in a process known as ______.
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Environmental conditions can affect gene _______.
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Organisms that have two identical traits, such as TT or tt.
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The modern science of genetics was founded by an Austrian monk named Gregor _______.
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Crossovers between two genes are rare when they are ______ together.
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The physical characteristics of an organism are it's _______.
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During gamete formation, the alleles for each gene ______ from each other so the each gamete carries only one allele for each gene.
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The different forms of a gene are called _______.
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A structure containing four chromatids that forms during meiosis.
Down
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A ________ square is a diagram used to predict the probable outcome of a genetic cross.
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A factor that is passed from parent to offspring and determines a trait.
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The frequency of cross-over between genes is used to construct gene _______.
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An example of incomplete dominance is when a red flower crossed with a white flower produces a _____ offspring.
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The scientific study of heredity is known as _______.
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Process in which homologous chromosomes exchange portions of their chromatids during meiosis.
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An example of a polygenic trait in humans is ______ color.
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A cells that contains both sets of homologous chromosomes is said to be _______.
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Alleles of different genes tend to be inherited together from one generation to the next when those genes are located on the same ______.
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A ______ is a specific characteristic, such as seed color or plant height.
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An organism with at least one _____ allele for a particular form of a trait will exhibit that form of the trait.
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The likelihood that a particular event will occur.
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When the phenotypes produced by both alleles are clearly expressed this is _________.
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The number of haploid cells at the end of meiosis II.
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The offspring of crosses between parents with different traits are called ______.
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A recessive allele is represented by a ______ version of the same letter used for the dominant allele.
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In a two factor cross, the probable ratio of offspring is 9:3:3:1 with 1 representing offspring that are homozygous ____ for both traits.
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Cases in which one allele is not completely dominant over another are called ______ dominance.
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Traits controlled by two or more genes are said to be ______ traits.
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An organism's genetic make up is it's ______.
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When using a Punnett square, a dominant allele is abbreviated using a ______ letter.
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A sex or reproductive cells is called a _______.
Good Luck!