General Biology Chapter 24 Quiz

(d). duplication
Which refers to the addition of a repeat segment of a chromosome?

(a). inversion
(b). translocation
(c). deletion
(d). duplication
(e). monosomy

an extra chromosome 21.
The most common autosomal abnormality present in people is
50%, since the mother is only a carrier.
If a woman is a carrier for the color blind recessive allele and her husband is normal, what are their chances that a son will be color blind?
Smooth green seeds or wrinkled yellow seeds only
If there is complete linkage with genes Ss (for smooth or wrinkled seeds) and Gg (for green or yellow seeds) what phenotypes would you expect in the offspring of a cross with one heterozygous parent (Ss, Gg) which would all produce all smooth and green seeds and a homozygous recessive parent (ss, gg) which would produce all wrinkled yellow seeds?
XYY; spermatogenesis
Generally, it is not possible to determine whether nondisjunction failed to occur in oogenesis or spermatogenesis. However, it is possible to assert that _____ resulted in nondisjunction in ____.
50%
Color-blindness is inherited as an X-linked recessive trait. A male who is color-blind marries a heterozygous woman. What percent of their total children will be color-blind?
hemophilia
Which of the following sex-linked diseases is characterized by the absence of a clotting factor?
nondisjunction.
When homologous chromosomes fail to separate during meiosis, this is termed
cri du chat syndrome.
If a person has a portion of number 5 chromosome missing, they may have
inversion.
If a chromosomal segment is turned around 180°, the chromosomal mutation is termed a(n)
can occur if the sperm has an extra number 21 chromosome.
Down syndrome
Down syndrome.
If a person has short stature, oriental-like fold of eyelids, fissured tongue and mental retardation, they have
(c). All chromosome pairs are numbered differently for males and females.
Which of the following is NOT true about a karyotype?

(a). Homologous chromosomes are arranged in pairs.
(b). Sex chromosomes are identified separately from autosomes.
(c). All chromosome pairs are numbered differently for males and females.
(d). Chromosome pairs are assorted by both size and shape.
(e). Banding patterns are used in pairing chromosomes.

cystic fibrosis
Which genetic trait is NOT associated with the chromosome involved in Down syndrome?
A linkage group
All of the genes on a single chromosome are
Y
Genes on the ___ chromosome determine if the sex of a child will be male or female.
(e). hemophilia
A karyotype will NOT reveal which of the following genetic diseases?

(a). Turner syndrome
(b). Klinefelter syndrome
(c). Down syndrome
(d). cri du chat syndrome
(e). hemophilia

Turner syndrome.
A person with an XO genotype is classified as having
female.
If a person inherits two X chromosomes, this individual will be
deletion.
The cri du chat syndrome represents a chromosomal mutation type termed
(b). Greatly increased incidence occurs with fathers over age 40.
Which statement is NOT true about Down syndrome?

(a). It is caused by a third copy of chromosome 21.
(b). Greatly increased incidence occurs with fathers over age 40.
(c). It is usually associated with chromosomal nondisjunction in meiosis.
(d). Characteristics include mental retardation and extra eyelid folds.
(e). Affected individuals display mental retardation.

(c). Deletion
Which refers to the loss of a portion of a chromosome?

(a). Inversion
(b). Translocation
(c). Deletion
(d). Duplication
(e). Monosomy

Gart
The ____ gene causes mental retardation by increasing the levels of purines in the blood.
the mother during egg formation.
An XXX female would most likely result from nondisjunction in
inactivation of any X beyond the first as a Barr body.
The reason that missing chromosomes and extra sex chromosomes do NOT cause more harm than they do is best explained by the
(a). It is found in the nuclei of females.
Which statement is TRUE regarding the Barr body?

(a). It is found in the nuclei of females.
(b). It is found in the nuclei of males.
(c). It is found in the cytoplasm of males.
(d). It is found in the cytoplasm of females.
(e). It is a condensed inactive Y chromosome.

(b). Klinefelter syndrome
Among the disorders caused by changes in chromosome structure are all BUT one of those listed below; that one is

(a). Fragile X syndrome
(b). Klinefelter syndrome
(c). Williams syndrome
(d). Cri du chat syndrome
(e). All of these are caused by a change in chromosome structure

(d). Klinefelter syndrome
Which of the following conditions is NOT due to a sex-linked gene?

(a). color blindness
(b). hemophilia
(c). muscular dystrophy
(d). Klinefelter syndrome
(e). inability to see red or green

(b). translocation
Which refers to the movement of a piece of one chromosome to another nonhomologous chromosome?

(a). inversion
(b). translocation
(c). deletion
(d). duplication
(e). monosomy

all her children.
A colorblind (recessive trait) woman will pass the allele to
duplication.
If a chromosomal segment appears more than once in the same chromosome, it is termed a(n)
50% of their daughters will be hemophiliac.
Hemophilia (h) is a sex-linked recessive trait. If a hemophiliac male marries a carrier female,
trisomy.
A person who has an extra copy of a chromosome is said to have
monosomy
Which refers to the loss of a complete chromosome?
(c).the types of sex chromosomes
Which of the following would not be the same in a male and female?

(a). the total number of autosomes
(b). the loci for the majority of their genes
(c). the types of sex chromosomes
(d). the inheritance of one X chromosome from their mother
(e). the need for 2 sex chromosomes

A locus
The location of a gene on a chromosome is called
Klinefelter
An individual who has an XXY combination of sex chromosomes is said to have _____ syndrome.
(a). Williams syndrome
Which genetic disorder is the result of a deletion of a section of an individuals chromosome?

(a). Williams syndrome
(b). Klinefelter syndrome
(c). Down syndrome
(d). Turner syndrome
(e). None of these are the result of a deletion of a section of an individuals chromosome.

50%
A male who is color-blind marries a heterozygous woman. What percent of their male children will be color-blind?
recessive X-linked trait.
https://d2l.nwfsc.edu/content/enforced/90893-BSC1005-HEISE-88236-20142/ppg/13570164018072354/1image001.png?_&d2lSessionVal=ECOxQxoSLz9ssNz5RKqKmG50W

Figure 24.1
The trait diagrammed in Figure 24.1 is a(n)

(a). Down syndrome
Karyotyping can be used to diagnose which of the following genetic disorders?

(a). Down syndrome
(b). phenylketonuria
(c). neurofibromatosis
(d). cystic fibrosis
(e). hemophilia

maleness results from the minimal presence of one Y chromosome.
Considering that males can have Klinefelter (XXY) syndrome, XYY, and normal XY chromosomal combinations, and females can have Turner (XO) syndrome, poly-X (XXX, XXXX), and normal XX combinations, it is obvious that
(a). A……….B
Which of the following pairs of alleles would be most likely to cross over?

(a). A……….B
(b). A…B……
(c). A……B…….C
(d). AB………….
(e). ……….AB

Jacobs syndrome.
If an individual has a XYY genotype, they are classified as having
(a). fragile X syndrome
Which of the following sex-linked disorders is characterized by an abnormal number of repeat sequences in the genome?

(a). fragile X syndrome
(b). hemophilia
(c). color blindness
(d). Duchenne muscular dystrophy
(e). none of these

(c). The father’s genotype can determine whether a son will have blue eyes but cannot determine whether a son will be a hemophiliac.
A mother is a carrier for blue eyes (autosomal recessive) and for hemophilia (X-linked recessive). Which of these is a correct statement?

(a). All sons will have blue eyes and be hemophiliacs.
(b). It depends on the father’s genotype whether the sons will have blue eyes and/or be hemophiliacs.
(c). The father’s genotype can determine whether a son will have blue eyes but cannot determine whether a son will be a hemophiliac.
(d). Regardless of the father, no sons will have blue eyes or be hemophiliacs.
(e). There is a linkage between eye color and hemophilia.

muscular dystrophy
Which disorder is characterized by a lack of the protein dystrophin?
Linked genes do not show independent assortment.
What is the relationship between linked genes and independent assortment?
0%
A normal male marries a color-blind woman. What percent of their female children will be color-blind?
XXX
A female with two Barr bodies in her cells would have what combination of sex chromosomes?
one bar-eyed and one nonbar-eyed female, one bar-eyed and one nonbar-eyed male
In fruit flies, bar eye is inherited by an X-linked allele (B for bar). If a heterozygous bar-eyed female is mated to a nonbar-eyed male, what will be the expected ratio of phenotype given four offspring?
(a). production of elastin
Which trait is NOT part of the linkage group found on chromosome 19?

(a). production of elastin
(b). Muscular dystrophy
(c). hair color (brown)
(d). eye color (green/blue)
(e). colorectal cancer

The distance between genes located on the same chromosome determines whether or not they can show any level of independent assortment.
What determines whether or not genes located on the same chromosome can assort independently?
Turner syndrome.
A female that does not undergo puberty or menstruate or lacks breast development may have
Klinefelter syndrome.
If an individual has a XXY genotype, they are classified as having

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