chp 21

If you want to know the probability that tossing two coins will result in a particular outcome (two heads, for example), you use the A. product rule. B. sum rule. C. punnett rule. D. Bergman's rule. E. genetics rule

product rule

Julie has a genetic disorder. Julie and her husband, Shane, have three children, none of which have the genetic disorder. How is this disorder most likely inherited? A. autosomal dominant. B. autosomal recessive. C. heterozygous dominant. D. The environment influences the trait instead of the genetics. E. 100% inheritance from the father since the children are not affected.

autosomal recessive

If an individual has the A blood type, how many different genotypes can they possess? A. one B. two C. three D. four E. five

two

Of the three possible alleles for the ABO blood type, each individual can have how many? A. one B. two C. three D. none E. half an allele

two

If a person with type B blood marries a person with type A blood, what phenotypes can their children be? A. all type A B. all type B C. types A and O D. types B and O E. types A, B, O, and AB

types A,B,O and AB

Which of the following terms refers to the genes of an individual? A. genotype B. phenotype C. gamete D. probability E. autosomal

genotype

When describing someone as "lactose intolerant", you are describing their A. genotype. B. phenotype. C. alleles. D. genome. E. none of these

phenotype

If a mother is a carrier for color-blindness and her husband is not, which of the following children are most likely? A. 1 normal daughter, 1 carrier daughter, 1 normal son, and 1 color-blind son B. 2 normal daughters, 1 normal son, and 1 color-blind son C. 2 carrier daughters, 1 normal son, and 1 color-blind son D. 1 normal daughter, 1 carrier daughter, and 2 normal sons E. 1 normal daughter, 1 carrier daughter, and 2 color-blind sons

1 normal daughter, 1 carrier daughter 1 normal son, and 1 color-blind son

In a cross of a homozygous dominant parent and a homozygous recessive parent, what is the ratio of offspring that will exhibit the recessive phenotype? A. 0. B. 1/4. C. 1/2. D. 3/4. E. 1.

0

The probability of tossing a coin and having it be heads or tails is A. 1/4. B. 1/2. C. 1. D. 0. E. 2.

1

In a cross of Ss x Ss, the probability of having a heterozygous genotype is A. 1/4. B. 1/3. C. 1/2. D. 2/3. E. 3/4

1/2

In a cross of Ff x Ff, the probability of having a dominant phenotype is A. 1/4. B. 1/3. C. 1/2. D. 2/3. E. 3/4.

3/4

There are two different alleles for the number of fingers on the hands: 5 finger allele and 6 finger allele. When both the 5 finger allele and the 6 finger allele are present in the same individual, the individual has 6 fingers on the hands. Which allele is dominant? A. 5 fingers B. 6 fingers C. 1 finger D. 11 fingers E. 7 fingers

6 fingers

In a dihybrid cross, in which both parents are heterozygous for both traits, what is the probability that the offspring will exhibit both of the dominant phenotypes? A. 1/16. B. 3/16. C. 6/16. D. 9/16. E. 1.

9/16

Which of the following is a dominant allele? A. A B. a C. AA D. ab E. Ab

A

Which of the following represents a gamete with a dominant allele? A. A B. b C. AA D. Aa E. bb

A

Which of the following represents a dihybrid cross? A. ff x ff B. Gg x gg C. AAbb x Aabb D. AAbb x aaBB E. Ss x ss

AAbb x aaBB

Which of the following would not be a possible way to list someone's genotype? A. BB B. Bb C. AB D. bb E. AA

AB

Which of the following traits would not be considered multifactorial? A. alcoholism B. suicide risk C. cleft lip/palate D. diabetes E. ABO blood type

ABO blood type

Which of the following genotypes is heterozygous? A. Aa B. Ab C. aB D. ab E. aa

Aa

Which of the following represents a cross to determine if an individual is homozygous or heterozygous dominant? A. Aa x aa B. AA x AA C. aa x aa D. Aa x AA E. Aa x Aa

Aa x aa

Which of the following traits is an X-linked recessive disorder? A. Color blindness B. Tay-Sachs C. Cystic fibrosis D. Sickle-cell disease E. Marfan syndrome

Color blindness

Which of the following X-linked recessive disorders is characterized by a degeneration of the muscles? A. Fragile X B. Duchenne's C. color blindness D. hemophilia E. malaria

Duchenne's

In a dihybrid cross, if the resulting ratios are 1:1:1:1, what are the genotypes of the parents? A. GgRr x ggrr B. GGRR x ggrr C. GgRr x GgRr D. Gg x Rr E. GG x RR

GgRr x ggrr

Which of the following disorders is a trinucleotide repeat disorder? A. Marfan syndrome B. sickle-cell disease C. cystic fibrosis D. Tay-Sachs disease E. Huntington disease

Huntington disease

Which of the following designations indicates a sex-linked trait? A. A B. I A C. X B D. a E. i

XB

Which of the following disorders is caused by a defect in the production of an elastic connective tissue protein called fibrillin? A. cystic fibrosis B. Tay-Sachs disease C. Marfan syndrome D. Huntington disease E. sickle-cell disease

Marfan syndrome

Which of the following is not an autosomal recessive disorder? A. Marfan syndrome B. Tay-Sachs disease C. cystic fibrosis D. sickle cell disease E. all are autosomal recessive disorders

Marfan syndrome

Which of the following is not a characteristic of an X-linked recessive disorder pedigree? A. An affected son can have normal parents. B. If a female has the trait, her father must also have it. C. The characteristic often skips a generation. D. More females than males are affected. E. If a woman has the characteristic, all of her sons will have it.

More females than males affected

9. Which of the following genetic disorders is due to a lack of the lysosome enzyme hex A? A. cystic fibrosis B. Tay-Sachs disease C. Huntington disease D. sickle-cell disease E. Marfan syndrome

Tay-Sachs disease

Which of the following represents the genotype of a male who is color-blind? A. X BX B B. X BX b C. X bX b D. X bY E. X BY

XbY

In a pedigree, an affected male would be designated by A. an open circle. B. a shaded circle. C. an open square. D. a shaded square. E. a square with a line through it.

a shaded square

Which of the following is an example of a recessive genotype? A. aa B. Aa C. short D. AA E. ab

aa

Which of the following individuals has a recessive phenotype? A. AA B. Aa C. AaBb D. aabb E. aAbB

aabb

Which of the following is not a characteristic of an autosomal dominant disorder pedigree? A. Affected children will usually have unaffected parents. B. Heterozygotes are affected. C. Two affected parents can produce an unaffected child. D. Both males and females are affected with equal frequency. E. Two unaffected parents will not have affected children.

affected children will usually have unaffected parents

There is a trait with two alleles. One allele codes for blue while the other allele codes for yellow. If this trait is inherited in a codominant manner, what color will the offspring be? A. blue B. yellow C. green D. blue and yellow striped E. white

blue and yellow striped

There is a single gene that controls the ability to taste PTC paper. The ability to taste is dominant to the inability to taste. If you can taste the paper, it is very bitter. Which of the following genotypes can taste the paper? A. only PP B. both PP and Pp C. both PP and pp D. only Pp E. only pp

both PP and Pp

How are Fragile X syndrome and Huntington disease similar? A. Both exhibit a late onset in life. B. Both are trinucleotide repeat expansion disorders. C. Both affect the muscles and lead to eventual paralysis. D. Both cause autism. E. Both are found only in males.

both are trinucleotide repeat expansion disorders

Unattached earlobes are a dominant trait in humans. Which phenotype is most likely for an individual with the genotype EE? A. both earlobes are unattached B. both earlobes are attached C. the right earlobe is attached and the left earlobe is unattached D. the right earlobe is unattached and the left earlobe is attached E. both earlobes are extremely elongated

both earlobes are unattached

An allele is to a gene, as a locus is to a A. gamete. B. phenotype. C. chromosome. D. genotype. E. unit of heredity

chromosome

Dad has a genotype of AaBb. How many different kinds of sperm can he produce? A. one B. two C. three D. four E. five

four

. Which of the following is not a characteristic of an autosomal recessive disorder pedigree? A. Heterozygotes have an affected phenotype. B. Affected children can have unaffected parents. C. Two affected parents will always have affected children. D. Both males and females are affected with equal frequency. E. Affected individuals with homozygous unaffected mates will have unaffected children.

heterozygotes have an affected phenotype

What is the genotype of a person with type O blood? A. I A I A B. I A I B C. I A i D. I B i E. ii

ii

How is familial hypercholesterolemia inherited? A. autosomal recessive B. autosomal dominant C. incompletely dominant D. codominant E. sex-linked dominant

incompletely dominant

. Clasp your hands together (without thinking about it). Which thumb is on top every time you do this? The dominant phenotype is left thumb on top. If you have the genotype "tt", which thumb is on top? A. left B. right C. left 50% of the time and right 50% of the time D. left 25% of the time and right 75% of the time E. left 75% of the time and right 25% of the time

right

Which of the following traits/disorders is controlled by multiple genes? A. skin color B. Tay-Sachs disease C. ABO blood type D. familial hypercholesterolemia E. curly hair

skin color

Which variable has the stronger influence on the color of an individuals skin? A. the individuals phenotype B. the amount of time spent in the sun C. the amount of time spent in the sun and the individuals genotype D. the individuals genotype E. neither the sun nor the individuals genotype have any influence on the individuals skin color

the amount of time spent in the sun and the individuals genotype