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Chapter 8: Problem 32

Which of the following terms should not be used to describe a human with three copies of chromosome 12 ? A. Polyploid B. Triploid C. Aneuploid D. Euploid E. \(2 n+1\) F. Trisomy 12

Short Answer

Expert verified
The term that should not be used to describe a human with three copies of chromosome 12 is 'Euploid' (Option D).

Step by step solution

01

Define Each Term

First, let's look at each term: - \tPolyploid: This refers to cells or organisms that contain more than two paired (homologous) sets of chromosomes.- \tTriploid: This refers to cells or organisms with three sets of chromosomes.- \tAneuploid: This refers to cells with abnormal number of a particular chromosome.- \tEuploid: This term is used to describe cells that have the correct number of chromosomes for their species.- \t\(2 n+1\): This is a formula generally used to describe an odd number of sets of chromosomes, where n is the normal haploid number of chromosomes.- \tTrisomy 12: This term is used to describe an organism or cell having three copies of chromosome 12.
02

Identify Incorrect Term

Given that we are talking about a human with three copies of chromosome 12, the term 'Euploid' would not be applicable here because this term is used to describe cells that have the correct number of chromosomes. In a typical human cell, there are only two copies of each chromosome, therefore, three copies of chromosome 12 qualifies as a chromosomal abnormality, not a 'euploid' condition.

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Most popular questions from this chapter

A diploid fruit fly has eight chromosomes. Which of the following terms should not be used to describe a fruit fly with four sets of chromosomes? A. Polyploid B. Aneuploid C. Euploid D. Tetraploid E. \(4 n\)

What is an allodiploid? What factor determines the fertility of an allodiploid? Why are allotetraploids more likely than allodiploids to be fertile?

A cytogeneticist has collected tissue samples from members of a certain butterfly species. Some of the butterflies were located in Canada, and others were found in Mexico. Through karyotyping, the cytogeneticist discovered that chromosome 5 of the Canadian butterflies had a large inversion compared with chromosome 5 of the Mexican butterflies. The Canadian butterflies were inversion homozygotes, whereas the Mexican butterflies had two normal copies of chromosome \(5 .\) A. Explain whether a mating between Canadian and Mexican butterflies would produce phenotypically normal offspring. B. Explain whether the offspring of a cross between Canadian and Mexican butterflies would be fertile.

Table 8.1 shows that Turner syndrome occurs when an individual inherits one \(\mathrm{X}\) chromosome but lacks a second sex chromosome. Can Turner syndrome be due to nondisjunction during oogenesis, spermatogenesis, or both? If a phenotypically normal couple has a color-blind child (due to a recessive X-linked allele) with Turner syndrome, did nondisjunction occur during oogenesis or spermatogenesis in this child's parents? Explain your answer.

Two phenotypically normal parents produce a phenotypically abnormal child in which chromosome 5 is missing part of its long arm but has a piece of chromosome 7 attached to it. The child also has one normal copy of chromosome 5 and two normal copies of chromosome 7. With regard to chromosomes 5 and 7 , what do you think are the chromosomal compositions of the parents?
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