Exam 14: Chromosomes and Human Inheritance

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 -Hemophilia is caused by an X-linked recessive gene.A normal woman whose father had hemophilia marries a normal man.What are the chances of hemophilia in their children?

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 a father and a son are both color blind and the mother is normal, is it likely that the son inherited color blindness from his father?

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

The sex chromosome composition of a person with Turner syndrome is

Amniocentesis involves sampling

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 -duplication

__________ is a diagnostic tool that reveals missing or extra chromosomes and some structural changes in an individual's chromosomes.

Matching.Match the cause with the disorder. a.autosomal recessive inheritance; lactose metabolism is blocked b.nondisjunction of the twenty-first chromosomal pair c.X-linked recessive inheritance d.nondisjunction of the sex chromosomes -red-green color blindness

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 -Red-green color blindness is an X-linked recessive trait.Two normal-vision parents have a color-blind son.Indicate the genotype and phenotype of each parent and the son.

Polyploidy

PKU can be detected by

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 AEDCBF are located on homologous chromosomes.Crossing over between them is suppressed because of this.

A prenatal diagnosis procedure that has recently come into wide use can be performed earlier than amniocentesis, and it involves sampling the

Rarely, a chromosome's structure becomes altered when part of it undergoes __________, __________, __________, or __________.

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 also known as trisomy 21.

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 -Short index fingers (shorter than the ring finger) are dominant in males and recessive in females, whereas long index fingers (as long as or longer than ring fingers) are dominant in females and recessive in males.Give the F₂ genotype and phenotype resulting from the cross of a male with long index fingers with a female with short index fingers.

Matching.Match the cause with the disorder. a.autosomal recessive inheritance; lactose metabolism is blocked b.nondisjunction of the twenty-first chromosomal pair c.X-linked recessive inheritance d.nondisjunction of the sex chromosomes -Turner syndrome

Some conditions like progeria do not run in families despite being autosomal dominant.How is that possible?

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 -monosomy

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 -In humans, an X-linked disorder called coloboma iridia (a fissure in the iris) is a recessive trait.A normal couple has an afflicted daughter.The husband sues the wife for divorce on the grounds of infidelity.Would you find in his favor?