Chromosomal And Human Inheritance

Topics: Gene, Allele, Blood type Pages: 6 (2030 words) Published: November 17, 2014
Chromosomal and human inheritance

1. An AABb individual is mated with another AABb individual. The possible number of genetically different kinds of offspring is _____. a. 3
b. 2
c. 9
d. 4
e. 1
2. The most common phenotype in a natural population is referred to as the _____. a. Mutant phenotype
b. Wild type
c. Liked gene
d. Autosome
e. Genotype
3. The most common lethal genetic disease in the United States is _____. a. PKU
b. Huntington’s disease
c. Sickle-cell disease
d. Hemophilia
e. Cystic fibrosis
4. An important technique that helps provide insight into interesting genetic questions at the molecular level, such as reasons for hairless dogs, is called _____. a. Testcross
b. DNA sequencing
c. Genetic testing
d. Pedigree development
e. Inbreeding
5. A red bull is crossed with a white cow and all of the offspring are roan, a shade between red and white. This is an example of genes that are _____. a. Nonhomologous
b. Codominant
c. Incompletely dominant
d. Epistatic
e. Completely dominant
6. Flower color in snapdragons is an example of incomplete dominance. If a red-flowered plant is crossed with a white-flowered plant, the F1 generation has pink flowers. If a pink-flowered plant is crossed with a pink-flowered plant, the progeny plants will be __________. a. 50% pink and 50% red

b. 25% red, 50% pink, and 25% white
c. 100% pink
d. 25% white and 75% red
e. 100% red
7. A man who has type B blood and a woman who has type A blood could have children of which of the following phenotypes? a. A, B, or O
b. AB or O
c. A or B only
d. AB only
e. A, B, AB, or O
8. If one parent is blood type AB and the other is type O, what fraction of their offspring will be blood type A? a. 0.25
b. 1.0
c. 0.5
d. 0.75
e. 0.0
9. Which of the following matings can produce a child with blood type AB? The letters refer to blood types (phenotypes). a. OxO
b. AxB
c. AxA
d. OxA
e. BxB
10. A woman with type O blood is expecting a child. Her husband is type A. Both the woman's father and her husband's father had type B blood. What is the probability that the child will have type O blood? a. 50%

b. 75%
c. 0%
d. 25%
e. 100%
11. A single allele that controls more than one character is _____. a. Autotrophic
b. Photogenic
c. Pleiotropic
d. Linked
e. Polygenic
12. In people with sickle-cell disease, red blood cells break down, clump, and clog the blood vessels. In addition, the red cells can accumulate in the spleen. Among other things this leads to physical weakness, heart failure, pain, and brain damage. Such a suite of symptoms can be explained by __________. a. The pleiotropic effects of the sickle-cell allele

b. The disease being the result of the inheritance of 2 linked genes c. Bacterial infection interacting with the sickle cell allele d. Side effects of the drugs used to cure sickle cell disease e. Polygenic nature of sickle cell disease

13. The inheritance of human characteristics, such as height and weight, can best be described as _______. a. Polygenic
b. All symptoms of Huntington’s disease
c. Being caused by microorganisms
d. The results of a bad lifestyle
e. Simple dominant-recessive inheritance
14. Are freckles the result of genetics or environment?
a. Genetics
b. Neither
c. Environment
d. Both
e. Something in addition to genetics and envi
15. You cross a true-breeding red-flowered snapdragon with a true-breeding white-flowered snapdragon. All of the F1are pink. What can you say about the alleles for the parental traits? a. Red and white show incomplete dominance

b. Pink is dominant, red and white are recessive
c. Red and white are codominant
d. Red is dominant
e. Red and white are recessive
16. Incomplete dominance is a condition in plants and people where __________. a. A lethal dominant allele is responsible for the inherited condition b. A single gene impacts more than one characteristic

c. offspring have an appearance in between the phenotypes of the two parents d....
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