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7- Human cells have a gene that codes for aspecific enzyme called E. Mouse cells do not carry the enzyme.Mouse-human hybrids are formed, and the following stable lines arestudied for the human chromosomes present and the presence orabsence of E:

Hybrid Cell Lines

1

2

3

4

5

6

Human Chromosome

21, 18, 16, 7, 5, 2

18, 16, 8 ,3

21, 18, 1

23 ,19, 17, 15, 11, 14

18, 6, 2, 9, 8, 3, 1

21, 5

E Activity

No

No

Yes

No

Yes

No

Which human chromosome contains the gene forthe enzyme E?

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Deanna Hettinger
Deanna HettingerLv2
28 Sep 2019

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___1. Nationally, the most common cause of Down Syndrome is
a. nondisjunction of Chromosome 21 during meiosis
b. translocation of Chromosome 21 onto another chromosome
c. inversion of a large section of Chromosome 21
d. deletion of the Down Syndrome gene
___2. In humans, sex is determined by
a. The presence or absence of the Y chromosome
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c. The temperature during fetal development
d. Which parent is stronger at the time of conception
___3. A translocation is
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d. an abnormality in which there is an extra copy of one chromosome
___ 4. In snapdragons, a red-flowered plant crossed with a white-flowered plant produces all pink-flowered offspring. But crossing two pink-flowered plants produces red, pink, and white in a 1:2:1 ratio. This is a good example of
a. Incomplete dominance
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c. Lethal effects of the pink allele
d. Sex-linkage of the flower-color alleles
___ 5. If a person with type AB blood marries a person with Type O blood, what blood types are possible in their children? (Assume this trait is a single-gene trait, not complicated by interaction with other genes).
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b. A or B only
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___6. In what phase of meiosis are haploid nuclei first formed? a. Anaphase I b. Metaphase II c. Telophase II d. Metaphase I e. Telophase I
___7. What is the phenotype of a heterozygous tall pea plant? a. tall b. Tt c. TT d. tt e. dominant
___ 8. If genes A and B are far apart on a chromosome, and A and C are close together, which of the following observations is expected?
a. Crossing over will occur more often between A and C than between A and B
b. Crossing over will occur at equal frequencies between A and C, and between A and B
c. Crossing over will occur more often between A and B than between A and C
___9. Sometimes an organism’s genotype for one gene masks the effect of a different gene. This phenomenon is called
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c. Co-dominance
d. Epistasis
e. Variable expressivity
___10. The dominant allele of a gene is
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___11. In human cells, DNA replication occurs
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b. In G1 phase of interphase
c. In G2 phase of interphase
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b. specialized transduction
c. generalized transduction
d. transformation 3
___ 13. Most calico cats are female. However, a few rare males are observed. What is the genotype of a male calico cat?
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b. Yes, a woman could be color-blind but only if she has an abnormal number of sex chromosomes.
c. No, women can't show sex-linked traits because they lack a Y chromosome.
d. No, women can't show sex-linked traits because they have two X chromosomes.
e. Yes, a woman could be color-blind if her father was color-blind and her mother was a carrier (heterozygous).

_______Column A___________________ ___________________Column B_____________________

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