QR Challenge: Genetics Review

Created using the ClassTools QR Treasure Hunt Generator

Teacher Notes

A. Prior to the lesson:

1. Arrange students into groups. Each group needs at least ONE person who has a mobile device.

2. If their phone camera doesn't automatically detect and decode QR codes, ask students to

• Download a QR reader (e.g. I-Nigma | NeoReader | Kaywa) onto their mobile devices
• Bring these devices into the lesson.

3. Print out the QR codes.

4. Cut them out and place them around your class / school.

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B. The lesson:

1. Give each group a clipboard and a piece of paper so they can write down the decoded questions and their answers to them.

2. Explain to the students that the codes are hidden around the school. Each team will get ONE point for each question they correctly decode and copy down onto their sheet, and a further TWO points if they can then provide the correct answer and write this down underneath the question.

3. Away they go! The winner is the first team to return with the most correct answers in the time available. This could be within a lesson, or during a lunchbreak, or even over several days!

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C. TIPS / OTHER IDEAS

4. A detailed case study in how to set up a successful QR Scavenger Hunt using this tool can be found here.

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Questions / Answers (teacher reference)

Question	Answer
1. In cattle, the hornless/ no horns condition (H) is dominant and the horned condition (h) is recessive. A bull without horns is crossed with a cow with horns. Of the four offspring, one (1) is horned and three (3) are hornless. Determine the genotype of the bull and the cow.	Hh (bull) x hh (cow)
2. In tomatoes, fuzzy skin (F) is dominant over smooth skin (f). A cross between a fuzzy skinned tomato and a smooth skinned tomato resulted in 69 fuzzy skinned tomatoes and 58 smooth skinned tomatoes.Determine the genotypes of the parents and double check with a cross.	Ff x ff
3. Hemophelia is a recessive sex-linked disorder. Give the genotype of a FEMALE who has hemophelia.	Xhxh
4. Achondroplasia (dwarfism) is caused by a dominant gene. Achondroplasia is also an example of a homozygous dominant LETHAL trait (Individuals born DD die as infants). A woman and a man, BOTH WITH DWARFISM marry. What would be the PHENOTYPIC ratio of their LIVING offspring?	2:1
5. In humans, the allele for being an albino is recessive to the allele for normal skin pigmentation. If two normal skin heterozygotes marry, what would be their % chance of having a child with albinism?	25%
6. In purple people eaters, ONE-HORN is dominant and NO horns is recessive. In the cross between a people eater that is heterozygous for horns and a people eater with NO horns, what is the expected PHENOTYPIC ratio?	2:2
7. In cows, fur color is controlled by a dominant white allele (W) and a dominant red allele (R). The heterozygote is called road (RW). How many DIFFERENT phenotypes would you expect if 2 ROAN cows mated?	3
8. Colorblindness is an X-linked recessive trait. Give the GENOTYPE for a carrier for colorblindness.	XNXn
9. The father of genetics is:	Mendel
10. The different versions of a gene (like T is tall, t is short) are called:	alleles
11. A breeder crossed a horse that was homozygous dominant for a particular trait with a horse that was homozygous recessive for the same trait. What percent of the foals will be HETEROZYGOUS?	100%
12. Traits that are controlled by genes located on the X chromosome are called:	sex-linked traits
13. A color-blind (x-linked recessive) woman marries a man who has normal color vision. What are their chances of having a colorblind daughter?	0%
14. Give an example of a POLYGENIC trait:	skin, hair, eye color, height.
15. A flower breeder decides to cross a red flowered plant with a white flowered plant. All of the offspring have PINK flowers. What inheritance pattern is this?	Incomplete dominance
16. How many alleles for each trait are donated by each parent?:	one
17. In peas, purple flowers are dominant to white. Give the genotype of a PURE BREEDING purple plant:	PP
18. A cross between a black cat & a tan cat produces a tabby pattern (black & tan fur together). If a tabby cat is mated to a black cat and they have 8 kittens, how many would you EXPECT to be TABBY?	4

 

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