Bio Topic 4.1b Eval – Genetics
In this topic you will take a quiz on genetics and how it influences the phenotypes of organisms. Use the illustrations and diagrams in the quiz to help you answer the questions. Good Luck!
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- Question 1 of 12
1. Question
Which statement best describes the relationship between an allele and a gene? Use the following example to help you answer the question.
- Question 2 of 12
2. Question
Which condition would most likely result in an increase in the phenotypic variation within a population? Phenotypic variation means physical differences.
- Question 3 of 12
3. Question
In a heterozygous genotype, the ___________ allele takes over in the phenotype.
- Question 4 of 12
4. Question
G = green, g = yellow
The genotype for a yellow plant is… - Question 5 of 12
5. Question
In 1917 the biologist Thomas Hunt Morgan conducted studies in which he kept some caterpillars in the dark and placed some others under red, green, or blue lights. Exposure to red light produced butterflies with brightly colored wings. Exposure to green light resulted in dark-colored wings. Exposure to blue light or no light resulted in pale-colored wings. What was the most likely conclusion of Morgan’s research?
- Question 6 of 12
6. Question
At birth Himalyan rabbits are usually white over their entire bodies. But when parts of their bodies reach temperatures below 20 degrees Celsius, a pigment that causes these parts to turn black is produced. Which of the following is most likely the cause of this phenomenon?
- Question 7 of 12
7. Question
How many alleles (letters) does a child get from each parent for each trait?
- Question 8 of 12
8. Question
In a Punnett square each box represents a(n)….
- Question 9 of 12
9. Question
      chromosomes are in a body cell and        chromosomes are in a sex cell.
- Question 10 of 12
10. Question
The passing of physical characteristics from parent to offspring is __________.
- Question 11 of 12
11. Question
A scientist observes that a certain trait is determined by a single allele. An organism inherited one version of the trait from one parent and another version from the other parent. Both versions of the trait are expressed in the phenotype of the offspring. Which pattern of inheritance best classifies the observed trait?
- Question 12 of 12
12. Question
Six puppies from a single litter have the following genotypes for a certain trait:  AA, Aa, AA, aa, aa, Aa. Which of the following describes how these alleles were passed on from parent to offspring?
