Genetics Exams
EXAM1
Q1. How many chromosomes are in a typical red blood cell taken from a normal person? Zero
Q2. The degree to which a trait is expressed in individuals is the expressivity of the trait.
Q3. In pedigrees, a male individual is symbolized as a square.
Q4. The chromosomal structure that anchors the spindle fiber to the chromosome is centromere.
Q5. The short arm of a submetacentric chromosome is symbolized as the p arm.
Q6. Genetic diseases transmitted only by a mother to both sons and daughters result from mitochondrial genes.
Q7. Within a species, when a gene has multiple alleles, a single individual may carry 2 alleles.
Q8. In humans the only cytoplasmic organelles besides nuclei that contain DNA are the mitochondria.
Q9. In a pedigree, a double line connecting a married couple indicates that the man and woman are related.
Q10. One of Mendel’s major contributions to the study of heredity was the application of statistics in analyzing results of crosses.
Q11. Metacentric describes a chromosome that has a centrally-placed centromere.
Q12. In a pedigree, the first affected family member seeking medical attention is the proband.
Q13. There are 22 autosomes present in an unfertilized human egg.
Q14. Multifactorial traits are those that result from the interaction of genes and the environment.
Q15. A man with the most common form of color-blindness has a son who is also colorblind. The son most likely inherited this condition from his mother.
Q16. Autosomes are ___________?
a. All chromosomes including the sex chromosomes
b. Those chromosomes found only in gametes
c. All chromosomes other than the sex chromosomes
d. The half of the chromosomes inherited from one parent
e. Chromosome pairs with unlike members
Q17. In a cross involving incomplete dominance ______.
a. Mendelian inheritance does not apply
b. The dominant phenotype is expressed in the F1
c. Heterozygotes have a phenotype like one of the parents
d. The recessive phenotype is
Q1. How many chromosomes are in a typical red blood cell taken from a normal person? Zero
Q2. The degree to which a trait is expressed in individuals is the expressivity of the trait.
Q3. In pedigrees, a male individual is symbolized as a square.
Q4. The chromosomal structure that anchors the spindle fiber to the chromosome is centromere.
Q5. The short arm of a submetacentric chromosome is symbolized as the p arm.
Q6. Genetic diseases transmitted only by a mother to both sons and daughters result from mitochondrial genes.
Q7. Within a species, when a gene has multiple alleles, a single individual may carry 2 alleles.
Q8. In humans the only cytoplasmic organelles besides nuclei that contain DNA are the mitochondria.
Q9. In a pedigree, a double line connecting a married couple indicates that the man and woman are related.
Q10. One of Mendel’s major contributions to the study of heredity was the application of statistics in analyzing results of crosses.
Q11. Metacentric describes a chromosome that has a centrally-placed centromere.
Q12. In a pedigree, the first affected family member seeking medical attention is the proband.
Q13. There are 22 autosomes present in an unfertilized human egg.
Q14. Multifactorial traits are those that result from the interaction of genes and the environment.
Q15. A man with the most common form of color-blindness has a son who is also colorblind. The son most likely inherited this condition from his mother.
Q16. Autosomes are ___________?
a. All chromosomes including the sex chromosomes
b. Those chromosomes found only in gametes
c. All chromosomes other than the sex chromosomes
d. The half of the chromosomes inherited from one parent
e. Chromosome pairs with unlike members
Q17. In a cross involving incomplete dominance ______.
a. Mendelian inheritance does not apply
b. The dominant phenotype is expressed in the F1
c. Heterozygotes have a phenotype like one of the parents
d. The recessive phenotype is