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20 Cards in this Set
- Front
- Back
There are NO sugars on the surface of any of the red blood cells for which blood type?
- type O - type AB - type A - type B |
type O
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When comparing the DNA fingerprints of a parent and child, the parent's DNA fingerprint will have which of the following genetic traits?
- DNA bands that match those in the child's fingerprint and that aren't from the other parent - DNA bands that are very close to bands found in the child but do not match precisely - all of the DNA bands that the child has - more than half of the DNA bands that the child has |
DNA bands that match those in the child's fingerprint and that aren't from the other parent
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A human sperm cell receives autosomes and
- an X chromosome always. - both an X and a Y chromosome. - a Y chromosome always. - either an X or a Y chromosome. |
either an X or a Y chromosome.
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If a blue-colored flower crossed with a white-colored flower produced light blue-colored flower offspring, then it's most likely a case of
- codominance. - sex linkage. - independent assortment. - incomplete dominance. |
incomplete dominance.
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Hemophilia is an X-linked recessive allele causing a blood disorder. What are the chances that a daughter of a normal man and a woman, who is heterozygous for the disease, will have hemophilia?
- 75% - 25% - 0% - 100% |
0%
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The enzyme used to synthesize daughter strands of DNA during PCR is called a ________.
- DNA polymerase. - Taq polymerase. - replicase. - RNA polymerase. |
Taq polymerase.
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If a daughter expresses an X-linked recessive gene, she probably inherited the trait from:
- both parents. - her grandmother. - neither parent. - her mother. - her father. |
both parents.
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When the phenotype of a heterozygote is intermediate between both homozygotes, the pattern of inheritance is ________.
- codominance - independent assortment - incomplete dominance - sex linkage |
incomplete dominance
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The AB blood type, in which both A and B alleles are expressed, is an example of
- codominance. - independent assortment. - sex linkage. - incomplete dominance. |
codominance.
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A child with type O blood could not have a parent with type ________ blood.
- O - B - AB - A |
AB
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Y-linked genes include a gene that produces hairy ears. A male with hairy ears should pass this trait
- only to his daughters. - only to his sons. - to all his children if the mother is a carrier. - only to his grandsons. |
only to his sons.
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Who is a "carrier" of X-linked disorders, such as hemophilia and color blindness?
- a male carrying the nonfunctioning allele - a male carrying the functioning allele - a homozygous female who carries the normal alleles - a person who has the X-linked disorder - a heterozygous female who is normal but carries one nonfunctioning allele |
a heterozygous female who is normal but carries one nonfunctioning allele
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When does codominance occur?
- a heterozygote expresses an intermediate phenotype - expression of two different alleles alternates from one generation to the next - both of the alleles in a heterozygote are expressed phenotypically in an individual - offspring exhibit several different phenotypic expressions of a single trait |
both of the alleles in a heterozygote are expressed phenotypically in an individual
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If a disease is caused by a dominant allele, it means that a person with the disease:
- will always pass it on to all their children. - could be either homozygous or heterozygous for the allele. - must be heterozygous for the allele. - will pass it on to one-fourth of their children. - must be homozygous dominant for the allele. |
could be either homozygous or heterozygous for the allele.
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A normal individual who is a carrier for an X-linked trait such as hemophilia
- is homozygous for the recessive condition. - cannot have daughters who have the allele. - shows the recessive phenotype. - is always female. |
is always female.
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Regarding the human sex chromosomes, which statement is correct?
- The X chromosome carries the genes for the development of male phenotype. - X and Y are different in size but carry nearly equal numbers of genes. - The X chromosome carries only gender-related genes. - The X chromosome carries more genes for asexual traits than does the Y. - The Y chromosome carries a greater number of genes for asexual traits than does the X chromosome. |
The X chromosome carries more genes for asexual traits than does the Y.
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Sex-linked traits can be expressed in
- males only. - carriers only. - females only. - either males or females. |
either males or females.
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A DNA fingerprint of a suspect doesn't match a DNA fingerprint from a blood sample taken at a crime scene. What can you conclude?
- The suspect was never at the crime scene. - The blood sample was probably degraded or destroyed in some way. - The blood came from a different person, but the suspect may have been there. - There is no DNA in a blood sample. |
The blood came from a different person, but the suspect may have been there.
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Describing a person as having hemophilia is to indicate his or her
- phenotype. - number of chromosomes. - genotype. - genetic code. |
phenotype.
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Which of the following is used to produce genetic fingerprints of people?
- VNTRs - Punnett squares - pedigree analysis - RNA polymerase |
VNTRs
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