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Unit 4-.  The different forms of a gene  An allele whose trait always shows up in the organism when the allele is present.

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Presentation on theme: "Unit 4-.  The different forms of a gene  An allele whose trait always shows up in the organism when the allele is present."— Presentation transcript:

1 Unit 4-

2  The different forms of a gene

3  An allele whose trait always shows up in the organism when the allele is present.

4  A segment of DNA on a chromosome that codes for a specific trait.

5  The scientific study of heredity.

6  An organism’s genetic makeup, or allele combination.

7  Having two different alleles for a trait.

8  Having two identical alleles for a trait.

9  An organism that has two different alleles for a trait; an organism that is heterozygous for a particular trait.

10  An organism’s physical appearance, or visible traits.

11  A chart that shows all the possible combinations of alleles that can result from a genetic cross.

12  An organism that always produces offspring with the same form of a trait as the parent.

13  An allele that is masked when a dominant allele is present. Recessive traits are only visible if an individual inherits two copies of the recessive allele

14  A characteristic that an organism can pass on to its offspring through its genes.


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