 |
1 | |
Gregor Mendel's work on garden peas demonstrated the importance of blending inheritance. |
|
| | A) | TRUE |
| | B) | FALSE |
|
2 | |
If a true-breeding tall pea plant is crossed with a true-breeding dwarf pea plant, what kind(s) of plants will appear in the F1 generation? |
|
| | A) | only tall plants |
| | B) | only dwarf plants |
| | C) | only plants of intermediate height |
| | D) | 75% tall plants and 25% short plants |
|
3 | |
Charles Darwin was unaware of Mendel's work on the mechanism of inheritance because |
|
| | A) | Mendel did his experiments after Darwin had died. |
| | B) | Darwin overlooked Mendel's work. |
| | C) | Darwin did not think the mechanism of inheritance was very important. |
| | D) | None of the above. |
|
4 | |
The F1 offspring of a cross between a pea plant that breeds true for green peas and a pea plant that breeds true for yellow peas are |
|
| | A) | all homozygous for the "green" allele. |
| | B) | all homozygous for the "yellow" allele. |
| | C) | all heterozygous. |
| | D) | 25% homozygous for the "green" allele, 25% homozygous for the "yellow" allele, and 50% heterozygous. |
|
5 | |
The F2 generation of a cross between a pea plant that breeds true for green peas and a pea plant that breeds true for yellow peas are expected to be |
|
| | A) | all homozygous for the "green" allele. |
| | B) | all homozygous for the "yellow" allele. |
| | C) | all heterozygous. |
| | D) | 25% homozygous for the "green" allele, 25% homozygous for the "yellow" allele, and 50% heterozygous. |
|
6 | |
You can always determine an organism's genotype by observing its phenotype. |
|
| | A) | TRUE |
| | B) | FALSE |
|
7 | |
You have a pea plant with round peas and would like to know its genotype at the "pea shape" locus. With what sort of pea plant should you mate this individual in a testcross? |
|
| | A) | one with round peas |
| | B) | one with wrinkled peas |
| | C) | one with purple flowers |
| | D) | You will not be able to determine the genotype by doing a testcross. |
|
8 | |
Which of the following best summarizes (in modern terminology) Mendel's Principle of Segregation? |
|
| | A) | An individual has two copies of each gene, and only one copy ends up in a given sperm or egg cell. |
| | B) | Individuals with different alleles at a genetic locus cannot produce viable offspring. |
| | C) | Homozygotes always mate with other homozygotes, and heterozygotes mate only with other heterozygotes. |
| | D) | None of the above. |
|
9 | |
There are cases in which Mendel's Principle of Independent Assortment does not apply. |
|
| | A) | TRUE |
| | B) | FALSE |
|
10 | |
Which of the following is NOT a difference between mitosis and meiosis? |
|
| | A) | Mitosis generates diploid daughter cells, whereas meiosis generates haploid daughter cells. |
| | B) | Mitotic cell divisions are associated with growth and tissue repair, whereas meiotic cell divisions are associated with gamete production. |
| | C) | Crossing over occurs during mitosis, but not during meiosis. |
| | D) | Mitosis involves a single cell division, whereas meiosis involves two cell divisions. |
|
11 | |
Which of the following produces hereditary patterns that resemble blending inheritance? |
|
| | A) | gene linkage |
| | B) | multiple alleles at a locus |
| | C) | crossing over |
| | D) | polygenes |
|
12 | |
Because an individual can have only two alleles at a given genetic locus, it is impossible for more than one allele of a gene to persist in a population. |
|
| | A) | TRUE |
| | B) | FALSE |
|
13 | |
Traits are more commonly governed by multiple genes than by single Mendelian loci. |
|
| | A) | TRUE |
| | B) | FALSE |
|
14 | |
The position on a chromosome where a gene is found is known as its |
|
| | A) | locus. |
| | B) | centromere. |
| | C) | allele. |
| | D) | chromatid. |
McGraw-Hill Higher Education