science griffin
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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| chromosomes | a doubled rod of condensed chromatin that contain DNA and genetic information
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| codominance | a condition in which neither of two alleles of a gene is dominant or recessive
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| hybrid | an organism that has two different alleles for a trait also called heterozygous
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| traits | a characteristic that an organism can pass onto its offspring through its genes or is inherited
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| meiosis | the process that occurs in sex cells by which the number of chromosomes is reduced by half
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| multiple allele | three or more forms of a gene that codes a single trait
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| phenotype | an organism's physical appearances or visible traits
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| allele | the different forms of a gene
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| carrier | a person who has one recesive allele for a trait and one dominant allele, but doesn't have the trait
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| dominant | an allele whose trait always shows up in the organism when the allele is present
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| genotype | an organisms genetic makeup or allele combination
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| heredity | the passing of traits from parents to offspring
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| heterozygous | having two different alleles for the same trait
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| pedigree | a chart or "family tree" that tracks which members of a family have a particular trait
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| probability | the likelihood that a particular event will occur
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| Punnett Square | a chart that shows all the possible combinations of alleles that can result from a genetic cross or the possible genetic combinations of parents compared to their offspring
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| recessive | an alllele that is masked when a dominant allele is present--- the weaker gene that is hidden when a dominant gene is present
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| purebred | an organism that always produces offspring with the same form of a trait as the parent
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| sex linked genes | a gene that is carried on the X and Y chromosome
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| sex linked traits | a trait that is carried on the X and Y chromosome
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| Describe the difference of genotype and phenotype. | genotype is an organisms genetic makeup and phenotype is an organisms physical traits.
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| How does masking occur? | Dominant allele masks the recessive allele.
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| What is codominance and give a descriptive example of a codominant trait. | codominance- the alleles are neither dominant nor recessive. As a result, neither allele is masked or hidden in offspring. example, In Erminette chickens, the alleles for black and white feathers are codominate.
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Created by:
lmajor
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