Question

QUESTION 14

Leber’s hereditary optic neuropathy is a condition that leads to blindness. It results due to a lack of chemical energy (ATP) in certain cells of the eye. Based on your knowledge, the organelle responsible for this disease is the _______________.

	A.	cell membrane
	B.	mitochondria
	C.	ribosome
	D.	cytoplasm

  

QUESTION 15

A man has a sister and a mother with albinism, an autosomal recessive disorder. The man (who is not ablino) has a child with a homozygous dominant (normal) woman. The chance that their child does NOT have the disease is _________.

	A.	0%
	B.	25%
	C.	50%
	D.	75%
	E.	100%

  

QUESTION 16

If an individual expresses a dominant disease, which of the following is true?

		All of his children will always inherit the disease.
		He will pass this disease to all of his daughters.
		There is at least a 50% probability that his children will inherit the disease.
		There is a 100% possibility that his sons will inherit this disease.

  

QUESTION 17

Freckling is a dominant characteristic. Which of the following crosses can produce individuals that exhibit a recessive phenotype?

	A.	Ff X FF
	B.	FF X ff
	C.	FF X Ff
	D.	Ff X Ff

  

QUESTION 18

If a true-breeding tall pea plant is crossed with a tall pea plant of unknown parentage. Which of the following is correct?

		All of the offspring (F1) will be short.
		Over several generations, no short individuals will appear.
		Some short individuals may appear in the F2 generation.
		Some of the F1 generation will be short.

  

QUESTION 19

If a heterozygous dominant tall pea plant is crossed with a short pea plant, what is the expected phenotypic ratio of tall:short plants?

		1:1
		1:2
		3:1
		all tall

  

QUESTION 20

Some cats are white, which is a dominant trait (W allele). Other cats are not white (they can be any other color). This is recessive. Which of the following is a black cat?

	A.	B-
	B.	BW
	C.	ww
	D.	W-

  

QUESTION 21

Morgan buys a male python from a snake dealer who tells him that the snake carries the albino allele. What is the most effective way for Morgan verify this statement?

		Breed the snake with a heterozygous female.
		Breed the snake with a homozygous normal female.
		Breed the snake with a female sibling.
		Breed the snake with a homozygous recessive albino female.

  

QUESTION 22

In a monohybrid cross, how many traits are examined?

		1
		2
		3
		4

  

QUESTION 23

In a one-trait test cross, the phenotype that disappears in the F1 generation is the -

		dominant trait.
		negative trait.
		recessive trait.
		heterozygote.

  

QUESTION 24

Allele is defined as _________________.

	A.	a recessive trait
	B.	a dominant trait
	C.	an alternate form of a gene
	D.	two genes that have identical traits

  

QUESTION 25

A cow with black and white patches is produced from a white bull and a black cow. This is an example of -

		incomplete dominance.
		codominance.
		dominance/recessive trait.
		polygenic.

  

QUESTION 26

Recessive phenotypes are "recessive" because ____________________.

	A.	people with these traits are easily dominated by other people
	B.	"recessive" refers to the fact that a lower case letter is used to represent the allele
	C.	an individual must possess two recessive alleles to exhibit the recessive phenotype
	D.	the allele is deeply recessed within the gene on the chromosome

  

QUESTION 27

Sickle cell disease is caused by a single mutation in the DNA of a particular gene. A person with this disease has red blood cells that lose their original donut shape and form a sickle shape. People with this disorder suffer from low energy levels, blood clots, and strokes. This is an example of -

		a multifactorial trait.
		polygenic inheritance.
		pleiotropy.
		codominance.

  

QUESTION 28

If both parents express a particular trait, but their child does not, what does this indicate about the trait?

		The trait is sex-linked dominant.
		The trait is sex-linked recessive.
		The trait is an autosomal recessive trait.
		The trait is an autosomal dominant trait.

  

QUESTION 29

A male is always homozygous for a trait that is -

		codominant.
		X-linked.
		autosomal.
		dominant.

  

QUESTION 30

Polydactyly (many digits) is a dominant condition. A person who has the genotype Pp will exhibit __________.

	A.	no fingers
	B.	5 fingers on each hand
	C.	2.5 fingers on each hand
	D.	more than 5 fingers on a hand

  

QUESTION 31

"Phenotype" is another word for _____________.

	A.	appearance
	B.	behavior
	C.	DNA
	D.	allele

  

QUESTION 32

A small segment of DNA that contains the specific code for a specific trait is known as a(n) _____________.

	A.	organism
	B.	genotype
	C.	chromosome
	D.	gene

  

QUESTION 33

Which of the following would not be a viable (alive) offspring?

	A.	XO
	B.	YO
	C.	XXY
	D.	A and B

  

QUESTION 34

Which of the following human syndromes is a monosomy?

	A.	Turner syndrome
	B.	Klinefelter syndrome
	C.	Down syndrome
	D.	Swyer syndrome

  

QUESTION 35

A genetic profile includes -

		the location of all known genes in the human genome.
		the entire base sequence of an individual's genome.
		all of an individual's normal genes.
		an individual's complete genotype, including mutations.

  

QUESTION 36

Preimplantation diagnosis is performed on _______________.

	A.	a sperm or egg from a person with fertility problems
	B.	a woman before she attempts pregnancy
	C.	a fetus, prior to birth
	D.	an early , 8 celled, embryo

  

QUESTION 37

In hemoglobin, the shift from glutamic acid to valine is considered what type of mutation?

		point mutation
		frameshift mutation
		deletion
		duplication

  

QUESTION 38

The technique of ultrasound provides a picture of the _____________________.

	A.	genes
	B.	mother
	C.	chromosomes
	D.	fetus

  

QUESTION 39

Inversions are chromosomal mutations that -

		always result in a syndrome.
		neither increase nor decrease the amount of genetic material in the cell.
		result from duplication of a portion of a chromosome.
		never disrupt gene regulation or cause physical abnormalities.

  

QUESTION 40

Which of the following syndromes is caused by a translocation?

	A.	Turner syndrome
	B.	Cri-du-chat syndrome
	C.	Down syndrome
	D.	Alagille syndrome

  

QUESTION 41

A tube placed through the female sex organ into the uterus to obtain a small sample of tissue is characteristic of ______________________.

	A.	chorionic villus sampling (CVS)
	B.	embryonic stem cell analysis
	C.	amniocentesis
	D.	genetic counseling

  

QUESTION 42

The sperm and egg of alligators contain 16 chromosomes each. A fertilized egg that will develop into a baby alligator contains _________________.

	A.	16 chromosomes
	B.	32 total chromosomes
	C.	8 homologous chromosomes
	D.	64 chromosomes

  

QUESTION 43

A parent has a deletion on one homologue of a pair of chromosomes. What is the probability of this individual's child carrying the same deletion?

		0%
		25%
		50%
		75%

  

QUESTION 44

A karyotype shows chromosomes arranged by -

		banding patterns, size, and shape.
		shape, size, and complexity.
		length, structure, and color.
		color, width, and length.

  

QUESTION 45

What kinds of mutations can be revealed through ultrasound?

		Some chromosomal abnormalities, such as Down syndrome and Edwards syndrome, and a few other known inherited disorders
		The genetic profile, including any mutant gene alleles the fetus may have.
		All chromosomal mutations, including deletions, duplications, inversions, and translocations.
		Only larger chromosomal mutations, such as the large deletion seen in individuals with cri du chat syndrome.

  

QUESTION 46

A person without a Y chromosome is always:

	A.	not able to be born (miscarried)
	B.	an abnormal male
	C.	a person with 45 ½ chromosomes
	D.	a female

  

QUESTION 47

A translocation chromosomal mutation is the exchange of segments between two homologous chromosomes.

True

False

  

QUESTION 48

A missing piece of chromosome 5 may result in a child whose glottis and larynx do not develop properly resulting in an abnormal cry. This is called -

		inv dup 15 syndrome.
		Klinefelter syndrome.
		Huntington syndrome.
		Cri du chat syndrome.

  

QUESTION 49

Chromosome number 1 is the ____________________.

	A.	most important chromosome
	B.	most of mutated chromosome
	C.	longest chromosome
	D.	only chromosome that is not paired

  

QUESTION 50

Chorionic villus sampling carries less risk of causing miscarriage than amniocentesis.

	A.	True
	B.	False

Answer 1

14.Leber’s hereditary optic neuropathy is a condition that leads to blindness. It results due to a lack of chemical energy (ATP) in certain cells of the eye. Based on your knowledge, the organelle responsible for this disease is the mitochondria because it is power factory of cell.

15.A man has a sister and a mother with albinism, an autosomal recessive disorder. The man (who is not ablino) has a child with a homozygous dominant (normal) woman. The chance that their child does NOT have the disease is 0%( An autosomal recessive disorder means two copies of an abnormal gene must be present in order for the disease or trait to develop).

16.If an individual expresses a dominant disease, which of the following is true

There is at least a 50% probability that his children will inherit the disease

17.Freckling is a dominant characteristic. Which of the following crosses can produce individuals that exhibit a recessive phenotype Ff xFf because here heterozygous condition and 3:1 ratio for exhibiting recessive phenotype