List 9
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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| trait | the genetic make up of an organism
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| gamete | a characteristic that can pass on to its offspring
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| homozygous | organisms with two identical alleles for a particular trait
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| heterozygous | an organism that has two different alleles for a trait (hybrid)
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| punnett square | A tool that describes all the possible combinations of alleles that can results from a genetic cross.
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| polygenic trait | governed by two or more genes. (Most traits i.e. skin and eye color)
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| crossing over | The physical exchange leading to an intermediate phenotype
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| nondisjunction | failure of the chromosomes to separate during anaphase of meiosis
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| phenotype | physical characteristics of an organism, regardless of its genes
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| genotype | the different forms of a gene; representation of genes by letters
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| sex linked trait | Genes carried on the X chromosome.
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| dominant | an allele whose trait always shows up
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| recessive | trait that is masked when a dominant allele is present
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| diploid | full set of chromosomes EX. 46
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| random assortment | chromosomes are sorted into daughter cells randomly
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| fertilization | union of egg and sperm to form a zygote
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| incomplete dominance | occurs when the phenotype of the offspring is somewhere in between the phenotypes of both parents, genes are expressed equally in a heterozygous
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| co-dominant allele | both alleles are expressed in heterozygous individuals
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| pedigree | Family tree showing inheritance of traits
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| carrier | A person who has one recessive allele but does not have the trait
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| haploid | a cell with only one copy of each chromosome, half EX 23
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| genetic variation | variations of genomes among individuals in a population.
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| allele | the different forms of a gene
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Created by:
chulin
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