Define aneuploidy and describe the sex chromosome aneuploidies involved in Turner syndrome, Klinefelter
syndrome, and XYY syndrome; list characteristics of each disorderWhat will be an ideal response?
ANSWER: Changes in chromosome number that involve less than a whole chromosome set are called
aneuploidy. In its simplest form, aneuploidy involves the gain or loss of a single
chromosome. Loss of a single chromosome is known as monosomy, and the gain of a single
chromosome is known as trisomy. Females with Turner syndrome have monosomy of the X
chromosome and are typically short, wide-chested, with rudimentary ovaries and puffiness of
the hands and feet. They may have an aortic constriction, but there is no intellectual disability associated with this condition. Most males with Klinefelter syndrome have an extra X
chromosome (XXY). They have fertility problems but few other symptoms. Males carrying
two Y chromosomes have XYY syndrome. Most are above average in height, have
personality disorders, and are of subnormal intelligence.
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A) mosquito avoidance and eradication B) vaccination C) monitoring bird populations D) tick avoidance
Which of the following is the correct sequence in
terms of increasing size? a. ecosystem >>> biogeographic realm >>> biome >>> biosphere b. ecosystem >>> biome >>> biosphere >>> biogeographic realm c. biome >>> ecosystem >>> biogeographic realm >>> biosphere d. ecosystem >>> biome >>> biogeographic realm >>> biosphere e. biogeographic realm >>> biome >>> ecosystem >>> biosphere
Why is carbon ideally suited to be the "backbone" in molecules produced by living organisms? What will be an ideal response?
Answer the following statements true (T) or false (F)
1. Abnormalities in the number of chromosomes, known as nondisjunction, are more common in younger parents. 2. Johann Gregor Mendel posited in his study on inheritance in plants that offspring exhibited an even blending of physical appearance and traits from parents. 3. This statement is false. Mendel posited in his study on inheritance in plants that offspring exhibited traits that are transmitted faithfully from parents to offspring in specific patterns. 4. This statement is false. The process of meiosis was not understood by the scientific community during Mendel’s lifetime. Mendel came to understand his laws of segregation and independent assortment through his meticulous breeding of pea plants with distinct observable traits. 5. An organism can have the genotype for an inherited genetic disease or condition, but never develop that condition.