Science at a Distance

Mendelian Genetics

Lecture Notes - Part 1 Mendelian Genetics - Topic Outline

Quick Check

Read each of the "Quick Questions" below and write down your answer.
When you have finished the test, click on the "ANSWERS" button and see how well you have done.

Test Number MG-1025

Quick Questions

1) A phenotypic trait is often a small part of the physical structure of an organism, such as the color of the flower of a plant. (True / False)

2) Mendel used pea plants for his breeding experiments that were almost the same, but differed in one small part of their phenotype (True / False)

3) He picked traits that were easily distinguished from one another, such as red and white flowers. (True / False)

4) In adult plants, each trait studied by Mendel is coded for by a collection of genes (3,4,or 5). (True / False)

5) Geneticists use letters to represent genes, R = normal gene for red flowers, etc. (True / False)

6) The normal form of a gene, called the "wilting form" is the one seen only in normal plants? (True / False)

7) Genes occur in four types of combinations in adult plants; RRR, RRr, Rrr, rrr? (True / False)

8) Plants with only one type of gene (R or r) are called "pure breeding"? (True / False)

9) Plants with two forms of a gene (e.g. Rr) are said to be heterozygous. (True / False)

10) If the "R" form of a gene gives red flowered plants, then the mutant form of this gene "r" will give plants with no flowers. (True / False)

11) If a plant contains both the R and the r forms of the flower gene it will have no color and no flowers. (True / False)

12) Only plants with two mutant genes (rr) will have colorless flowers. (True / False)

13) Mendel saw that there was no observable pattern in the inheritance of his traits, even if he followed his experiments out for many generations. (True / False)

14) Mendel crossed two parental plants, collected and grew the seeds into the F1 generation, then crossed these F1 plants to get the F2 generation. (True / False)

15) At every generation, Mendel collected two seeds, planted these seeds and grew two plants for the next generation. (True / False)

16) Mendel counted the number of plants showing the trait, and counted the number of plants not showing the trait. (True / False)

17) He used these raw numbers to calculate the ratios of these two types of plants in each generation. (True / False)

18) Mendel saw that these simple ratios could be easily explained if his plants had a binary genotype. (True / False)

19) He called genes "elementes", and said that each plant had two of them for each trait (such as flower color). (True / False)

20) Diploid and haploid cells and organisms have at least two, almost identical genes for each trait. (True / False)

21) Diploid cells contain two sets of almost identical chromosomes. (True / False)

22) Haploid cells are found in the sex organs (flowers) of Mendel's plants. (True / False)

23) Male sex gametes are found in the pollen grains of Mendel's plants (True / False)

24) The "peas" that we eat at meal times are the seeds of the pea plant which contain the fertilized zygotes. (True / False)

25) Seeds grow into new plants only after they are fertilized. (True / False)

Answers to Part 1
Lecture Notes -
Part 1
Lecture Notes -
Part 2
Lecture Notes -
Part 3
Mendelian Genetics - Topic Outline
Science at a Distance
© 1997, Professor John Blamire