Unformatted text preview: MCB 200 Name
Quiz #5 Section 1. What genetic event results in the chromosome abnormality whereby the linear
order of a group of genes is the reverse of the normal order? Inversion 2. The monosomy condition in which a female genome contains one less X
chromosome than normal results in what speciﬁc genetic syndrome? ﬁrmer“ Syndrome. 3. What is the event in which the centromeric regions of two non-homologous
acrocentric chromosomes become fused to form a singular centromere? RC7 be rfSon‘cqn 71:4 T73 IOCO‘ £077 4. How many Barr bodies would be present in white blood cells of an individual of
karyotype 48, XXYY? One 5. What is an arrangement of metaphase chromosomes according to their length and
centromere placement? karyofyPe A boy has subnorrnal intelligence but appears otherwise phenotypically normal until he
reaches puberty. At this time, he fails to undergo normal male sexual development but
begins to display breast development more characteristic of females. His parents have taken him for a karyotype analysis which reveals an extra X chromosome. 6. What is the genetic disease described by the boy’s sex chromosome composition?
KI‘INE‘Q’. "(er Syndrome
7. What genetic event is responsible for this boy’s unusual genotype? NonalTS‘] q WCﬁOW
The boy’s mother is colorblind, and his father is normal for this X-linked recessive color
Vision. The boy also has normal color vision. 8. In which parent must this genetic event have occurred?
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9. What were the sex chromosome composition of the gametes (X, XX, XY, or Y) that produced the boy’s genotype at fertilization? x Sm X y 10. At what speciﬁc stage of cell division must this event have occurred? ME‘IOSZS I ...
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- Spring '08