Science at a Distance

Mendelian Genetics

Lecture Notes - Part 3 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-3025

Quick Questions

1) If a pea plant has red flowers then it has green seeds. (True / False)

2) Mendel saw that the gene coding for one trait did not affect a gene coding for another trait such as the height to which the plant could grow. (True / False)

3) Mendel showed that the inheritance pattern of one gene was independent of the inheritance pattern of a second, unrelated gene. (True / False)

4) It is not possible to create pure breeding plants that have red flowers and are tall growing, both at the same time. (True / False)

5) A plant with white flowers and short in height has the genotype rr:Tt, because one of the height genes is damaged. (True / False)

6) A "Two Factor Cross" involves crossing two different plants each of which carries one gene that is different. (True / False)

7) If a plant that carries the genotype RR:TT, it can produce two different sex gametes; R-containing gametes and T-containing gametes. (True / False)

8) All the zygotes in a two factor cross are haploid. (True / False)

9) All the F1 plants in Mendel's two factor cross were Red flowered and half of them were tall. (True / False)

10) During the second round of Mendel's two factor cross, the Red/Tall F1 plants were mated. (True / False)

11) The sex gametes produced by the F1 plants all contained an R gene. (True / False)

12) Half the sex gametes produced by the F1 plants contained a t gene. (True / False)

13) Four different sex gametes were produced by Mendel's F1 plants. (True / False)

14) Chromosomes and the genes they carry sort themselves out into sex gametes independently of one another during meiosis. (True / False)

15) At fertilization, a sex gamete from one plant with an R-gene can only fuse with a sex gamete from the other plant if it has an r-gene. (True / False)

16) When Mendel grew the F2 generation of plants he found some new phenotypes. (True / False)

17) Some of the F2 plants in Mendel's two factor cross had red and white flowers. This was a new phenotype. (True / False)

18) In humans, the sex of an individual is determined by gene(s) carried on the Y chromosome. (True / False)

19) If a person has a Y chromosome, that person has the ability to produce male sex gametes after meiosis. (True / False)

20) A person with an X and a Y chromosome can produce two types of sex gametes. (True / False)

21) If an X-containing gamete fuses with an X-containing gamete, the zygote will be phenotypically female. (True / False)

22) X-chromosomes have no other genes. (True / False)

23) Y-chromosomes are only involved in sex determination. They do not have the gene for blood clotting proteins. (True / False)

24) A person with two X chromosomes, but with one damaged blood clotting gene, is a hemophiliac. (True / False)

25) A person with one X chromosome and one Y chromosome and one damaged blood clotting gene is a hemophiliac. (True / False)


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