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16 Cards in this Set
- Front
- Back
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The chemical factors that determine traits are called
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Genes
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The principle of dominance states that
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some alleles are dominant and others are recessive.
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Organisms that have two identical alleles for a particular trait are said to be
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homozygous.
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The number of chromosomes in a gamete is represented by the symbol
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N
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If an organism’s diploid number is 12, its haploid number is
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6
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Gametes are produced by the process of
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Meiosis
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What is shown in http://upper.usm.k12.wi.us/academics/faculty/rheun/inherittest_files/i0080000.jpg
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crossing-over
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Chromosomes form tetrads during
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prophase of meiosis I.
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Unlike mitosis, meiosis results in the formation of
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four genetically different cells.
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Linked genes
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are on the same chromosome.
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How many chromosomes are shown in a normal human karyotype?
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46
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Which of the following can be observed in a karyotype?
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an extra chromosome
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In humans, a male has
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one X chromosome and one Y chromosome.
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Colorblindness is more common in males than in females because
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the allele for colorblindness is recessive and located on the X chromosome.
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The failure of chromosomes to separate during meiosis is called
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nondisjunction.
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Because the X chromosome contains genes that are vital for normal development, no baby has been born
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without an X chromosome.
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