Punnett Square 4 describes a cross between two heterozygous parents (PpSs x PpSs). Was this Punnett...
Punnett Square 4 describes a cross between two heterozygous parents (PpSs x PpSs). Was this Punnett square a good predictor of offspring phenotypes? Use the results of the chi-square test to support your answer.
Chi-square results below:
Degrees of Freedom= 3
P-value range= Between 0.500 and 0.050. (p>0.05)
Conclusion= There is no significant statistical difference between the observed and expected values.
Homework Answers
| PS | Ps | pS | ps | |
| PS | PPSS | PPSs | PpSS | PpSs |
| Ps | PPSs | PPss | PpSs | Ppss |
| pS | PpSS | PPSs | PpSs | Ppss |
| ps | PpSs | Ppss | ppSs | ppss |
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Punnett Square 4 describes a cross between two
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GENETICS: Assume that a cross is made between a heterozygous tall pea plant and a homozygous...
GENETICS:
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Figure 1. Sweet pea plant cross
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A mating between a heterozygous individual and a homozygous recessive individual results in 11 heterozygous progeny and 22 homozygous individuals. Do these observations fit a hypothesis of a 1:1 ratio of phenotypes? Conduct a Chi-square test to determine if these observations fit the hypothesis. Include: 1. The Chi-square value 2. The number of degrees of freedom 3. The p-value 4. Interpret what the p-value means. HTML Editor
GENETICS:
Assume that a cross is made between a heterozygous tall pea plant and a homozygous short pea plant. Fifty offspring are produced in the following frequency: 30 = tall; 20 = short What frequency of tall and short plants is expected? Compute a Chi-square value associated with the appropriate test of significance. How many degrees of freedom are associated with this test of significance?
R. C. Punnett conducted experiments on the inheritance of traits
in the sweet pea, Lathyrus odoratus. In one experiment, he crossed
two different true-breeding sweet pea plant strains, one with erect
petals and long pollen, and the other with hooded petals and round
pollen. All the offspring (F1F1 generation) had erect petals and
long pollen (Figure 1).
Figure 1. Sweet pea plant cross
Next, Punnett allowed the F1F1 generation to self-fertilize and
recorded the phenotypes of their offspring. The data...
Draw a Punnett square for a cross between a woman who has hemophilia (X-linked recessive inheritance) & a man who is unaffected by hemophilia. Then, answer the following questions about your results. a. what percent of their offspring are likely to be affected males? b. What percent of their offspring are likely to be affected females? C. What percent of their offspring are likely to be normal (unaffected) males? d. What percent of their offspring are likely to be normal...
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