This is slides 31 and 32
You perform the cross between
the heterozygous pea plants described in question 3 and get the
following data. What is your null hypothesis?
tell me which of the four asci show evidence of crossing over. It could be 0-4 of the asci shown.
Low Starch, Tall: 104
Low Starch, Short: 48
High Starch, Tall: 35
High Starch, Short: 17
This is the question 3
In this lab, we were hoping to be able to do some genetics experiments with your fast plants. That doesn't get to happen now, but THINK about those fast plants for a minute. Based on the setup of the fast plant experiment (see powerpoint slides 28-32 for more details), answer the following prompts.
1. What would be a good quality and reasonable hypothesis for experiment 8.1 (the monohybrid cross described on slide 31)?
2. What would be your prediction for the results from this experiment, if your hypothesis is true?
3. What would be a good quality and reasonable hypothesis for experiment 8.2 (the dihybrid cross described on slide 32)?
4. What would be your prediction for the results from this experiment, if your hypothesis is true?
Homework Answers
1. What would be a good quality and reasonable hypothesis for experiment 8.1 (the monohybrid cross described on slide 31)?
Because the cross is a monohybrid cross = AA X aa
| a | a | |
| A | Aa | Aa |
| A | Aa | Aa |
The F1 plats will be Aa and we know all of them are purple
A good hypothesis would be that purple is a dominant character (A = purple).
2. What would be your prediction for the results from this experiment, if your hypothesis is true?
If the hypothesis is true for the F2 a cross of Aa for Aa we will also expect a majority of purple plants but also some green plants
| A | a | |
| A | Aa | Aa |
| a | AA | aa |
Aa = purple
AA = purple
aa = green
3/4 = purple and 1/4 =green
3. What would be a good quality and reasonable hypothesis for experiment 8.2 (the dihybrid cross described on slide 32)?
Because the cross is a dihybrid cross = AABB X aabb
| ab | ab | ab | ab | |
| AB | AaBb | AaBb | AaBb | AaBb |
| AB | AaBb | AaBb | AaBb | AaBb |
| AB | AaBb | AaBb | AaBb | AaBb |
| AB | AaBb | AaBb | AaBb | AaBb |
The F1 plats will be AaBb and we know all of them purple steam / green leafs
A good hypothesis would be that purple is a dominant character for steam (A = purple) and that green is also a dominant character for leves (B = green) .
4. What would be your prediction for the results from this experiment, if your hypothesis is true?
If the hypothesis is true for the F2 a cross of AaBb x AaBb we will also expect a majority of purple steam / green leafs plants but also all the other possible variations.
| AB | Ab | aB | ab | |
| AB | AABB | AABb | AaBB | AaBb |
| Ab | AABb | AAbb | AaBb | Aabb |
| aB | AaBB | AaBb | aaBB | aaBb |
| ab | AaBb | Aabb | aaBb | aabb |
AxBx = purple steam / green leafs plants
Axbb = purple steam / yellow leafs plants
aaBx = green steam / green leafs plants
aabb= green steam / yellow leafs plants
Add Answer to:
This is slides 31 and 32You perform the cross between
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Match the following terms with the appropriate description below: a. alleles b. autosomes c. dominant allele...
Match the following terms with the appropriate description
below:
a. alleles b. autosomes c. dominant allele d. genotype e.
heterozygous f. homozygote g. phenotype h. recessive allele i. sex
chromosomes
1. ________________ genetic make-up
2. ________________ how genetic make-up is expressed
3. ________________ chromosomes that dictate most body
characteristics
4. ________________ alternative forms of the same gene
5. ___________an individual bearing two alleles that are the same
for a particular trait 6. ________________ an allele that is
expressed, whether in...
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Evaluating your phenotypes and genotypes and testing a genetic hypothesis in corn There are two activities in this write up. In the first, you will evaluate your phenotypes and genotypes and relate them to parental phenotypes and genotypes. In the second, you will test a hypothesis using a monohybrid cross in corn and carry out a Chi-squared analysis. For the write up, please copy and paste the remaining part of the Lab document into a new document, then fill in...
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Question 12 only.
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Match the following terms with the appropriate description
below:
a. alleles b. autosomes c. dominant allele d. genotype e.
heterozygous f. homozygote g. phenotype h. recessive allele i. sex
chromosomes
1. ________________ genetic make-up
2. ________________ how genetic make-up is expressed
3. ________________ chromosomes that dictate most body
characteristics
4. ________________ alternative forms of the same gene
5. ___________an individual bearing two alleles that are the same
for a particular trait 6. ________________ an allele that is
expressed, whether in...
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