Chromosomes – Flashcards
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Which best describes a centromere?
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the part of a chromosome that joins the sister chromatids
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How can the two chromosomes that make up a homologous pair differ?
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They can contain different alleles for the same trait.
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Consider the chromosome.
Which best describes the function of the part labeled b?
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codes for a specific trait
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Pedigrees and karyotypes provide the means for individuals to identify their risks for genetic disorders. What can be observed on a karyotype but not a pedigree?
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a visual image of a chromosomal defect
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Karyotypes can be studied to determine an organism's chromosomal makeup and to detect genetic defects. Turner syndrome occurs when a female has an incomplete set of sex chromosomes. Symptoms to Turner syndrome include swollen hands and feet, short stature, and infertility. Which type of chromosomal mutation is responsible for causing Turner syndrome?
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aneuploidy
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Which term describes the chromosomal abnormality of having three copies of a single chromosome?
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trisomy
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While analyzing a karyotype, genetics identify a missing chromosome. Which term best describes this chromosomal abnormality?
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aneuploidy
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Consider the chromosome.
Which is indicated by the letter a?
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petit arm
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Which flow chart best shows the relationship between the cell structures that are listed?
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gene-> DNA -> chromosome-> nucleus
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Which diagram shows a homologous chromosome pair that has homozygous alleles?
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D
