Exam 14: Chromosomes and Human Inheritance

-The probability of producing a normal child by two parents who are carriers for an autosomal recessive disorder is

-Which of the following is the genetic condition observed in the middle person from the above figure?

How did the cessation of crossing-over contribute to the disparity between the X and Y chromosomes?

MATCHING Matching.Choose the most appropriate answer for each. a.3n; generally sterile b.a chromosome segment is permanently transferred to a nonhomologous chromosome c.(2n - 1); a zygote deprived of a chromosome d.a repeat of a particular DNA sequence in the same chromosome or in nonhomologous ones e.(2n + 1); three chromosomes of the same kind are present in a set of chromosomes f.a piece of the chromosome is inadvertently left out during the repair process g.inhibits microtubule assembly; used in karyotyping h.a chromosome segment that has been cut out and rejoined at the same place, but backward -inversion

Classification.Select the best process listed below for each of the following statements.Note that you need to know that the sequence of amino acids directly reflects the sequence of genes that coded for their placement. a.an inversion b.a deletion c.a gene duplication d.a translocation e.an addition -Homologous sets of genes ABCDEF and aBCdEF are located on nonhomologous chromosomes.Crossing over between them is suppressed because their locations are the result of this.

Classification.Select the best disorder listed below to match the following statements. a.Galactosemia b.Turner syndrome c.Klinefelter's syndrome d.hemophilia A e.Down syndrome -If an X-linked recessive gene is expressed in 4 percent of the men, what proportion of women would express the recessive trait?

Classification.Select the best process listed below for each of the following statements.Note that you need to know that the sequence of amino acids directly reflects the sequence of genes that coded for their placement. a.an inversion b.a deletion c.a gene duplication d.a translocation e.an addition -The nucleotide sequences of homologous regions of DNA of two species are AATGCCCCGTTA and AATGCCCCGCTTA.If this is not the result of a nucleotide base-pair addition, then it is most likely the result of this.

The sex chromosome composition of a person with Klinefelter syndrome is

Classification.Select the best process listed below for each of the following statements.Note that you need to know that the sequence of amino acids directly reflects the sequence of genes that coded for their placement. a.an inversion b.a deletion c.a gene duplication d.a translocation e.an addition -A small region of a protein from three species is sequenced and found to be as follows: species X is alanine, valine, threonine, alanine species Y is alanine, glycine, threonine, alanine species Z is alanine, valine, glycine, threonine, alanine The difference in the amino acid sequence of species Z is most likely due to this.

Classification.Select the best disorder listed below to match the following statements. a.Galactosemia b.Turner syndrome c.Klinefelter's syndrome d.hemophilia A e.Down syndrome -This disorder is due to a sex chromosome abnormality probably caused by nondisjunction of sex chromosomes at meiosis.

Which of the following is a transfer of genes between non-homologous chromosomes?

Classification.Answer the following questions in reference to the five items listed below. a.12 b.23 c.24 d.46 e.47 -Following a gene duplication event involving only five loci, how many chromosomes will a human female have?

A woman heterozygous for color blindness (an X-linked recessive allele) marries a man with normal color vision.What is the probability that their first child will be color blind?

It is now possible to analyze the genetics of the new generation by

Classification.Select the best disorder listed below to match the following statements. a.Galactosemia b.Turner syndrome c.Klinefelter's syndrome d.hemophilia A e.Down syndrome -For this disorder, both a phenotypic cure and a genotypic cure are potentially possible.

Symptoms of phenylketonuria (PKU) may be minimized or suppressed by a diet low in

Chromosomal aberrations can be produced by exposure to

-The above figure represents which of the following chromosomal changes:

Classification.Select the best disorder listed below to match the following statements. a.Galactosemia b.Turner syndrome c.Klinefelter's syndrome d.hemophilia A e.Down syndrome -An X-linked recessive gene (c) produces red-green color blindness.A normal woman whose father was color blind marries a color-blind man. (a) What are the possible genotypes for the mother of the color-blind man? (b) What are the possible genotypes for the father of the color-blind man? (c) What are the chances that the first son will be color blind? (d) What are the chances that the first daughter will be color blind?

Which of the following is most logical from a health perspective?