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Introduction to Genetics (Ch 11)

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