Question
Gregor Johann Mendel, the Father of genetics, conducted his groundbreaking experiments with peas. The table below...
Gregor Johann Mendel, the Father of genetics, conducted his groundbreaking experiments with peas. The table below shows the results of one of his experiments (adapted from Cramer, 1999). With a sample of peas, the characteristics were distributed as follows: ------------------------------- Phenotype Number ------------------------------- Round and Yellow 315 Round and Green 108 Angular and yellow 101 Angular and Green 32 ------------------------------- Test the hypothesis that the distribution of characteristics in the sample points to a population where phenotype distribution is random. Briefly describe the result of the test (one or two sentences is sufficient).
Homework Answers
Answer #1
Assuming the distribution of characteristics is random, Expected Frequency of each characteristic = 556/4=139.
Chi Squre Table is formed as follows:
| O | E | (O - E)2/E |
| 315 | 139 | 222.8489 |
| 108 | 139 | 6.9137 |
| 101 | 139 | 10.3885 |
| 32 | 139 | 82.3889 |
Total = 
|
322.54 | |
ndf = 4- 1 = 3
Take 
= 0.05
From Table, critical value of
= 7.82
Since calculated value of
is greater than critical value of
, the difference is significant. Reject null hypothesis.
Conclusion:
The data do not support the claim that the distribution of characteristics in the sample points to a population where phenotype distribution is random.
Not the answer you're looking for?
Similar Questions
When Gregor Mendel conducted his famous genetics experiments with peas, one sample of offspring consisted of...
When Gregor Mendel conducted his famous genetics experiments
with peas, one sample of offspring consisted of 428 green peas and
152 yellow peas.
a) Find a 95% confidence interval estimate of the proportion of
yellow peas.
b) Based on his theory of genetics, Mendel expected that 25% of
the offspring peas would be yellow. Do the results contradict
Mendel’s theory? Why or why not?
In Gregor Mendel’s experiments with peas he observed 315 round and yellow, 108 round and green,...
In Gregor Mendel’s experiments with peas he observed 315 round
and yellow, 108 round and green, 101 wrinkled and yellow, and 32
wrinkled and green. According to his theory of heredity the numbers
should be in the proportion of 9 : 3 : 3 : 1.
• Is there any reason to doubt his theory at the level of 0.01
or 0.05 significance?
• What is the P value?
3. When Gregor Mendel conducted his famous hybridization experiments with peas, one such experiment resulted in...
3. When Gregor Mendel conducted his famous hybridization
experiments with peas, one such experiment resulted in 580
offspring peas, with 26.2% of them having yellow pods. According to
Mendel’s theory, 25% of them should have yellow pods. Use a .05
significance level to test the claim that the proportion of peas
with yellow pods is 25%.
a. Check your assumptions (SINS).
b. Set up the null and alternative hypotheses.
?0:______________________
?1:______________________
c. You will run the following type of...
21.02 Gregor Mendel has been called the “father of genetics,” having formulated laws of inheritance even...
21.02 Gregor Mendel has been called the “father of genetics,”
having formulated laws of inheritance even before the function of
DNA was discovered. In one famous experiment with peas, he crossed
pure breeds of plants producing smooth peas and plants producing
wrinkled peas. The first-generation peas were all smooth. In the
second generation (F2), he obtained 5474 smooth-pea plants and 1850
wrinkled-pea plants. Do these data agree with the conclusion that
F2 is made up of 75% dominant trait (in...
When Mendel experimented with crossing different types of peas, he noted both the color (green or...
When Mendel experimented with crossing different types of peas,
he noted both the color (green or yellow) and the shape (round or
wrinkled) of the peas produced. The table below gives the predicted
percentage of each type according to Mendelian genetics.
Round 0.1875 (green) 0.5625 (yellow)
Wrinkled 0.0625(green) 0.1875(yellow)
If one pea is drawn at random from the peas produced, what is
the probability it is round?
If a simple random sample of 20 peas is drawn from those
produced,...
When a scientist conducted a genetics experiments with peas, one sample of offspring consisted of 951951...
When a scientist conducted a genetics experiments with peas,
one sample of offspring consisted of
951951
peas, with
741741
of them having red flowers. If we assume, as the scientist
did, that under these circumstances, there is a
3 divided by 43/4
probability that a pea will have a red flower, we would expect
that
713.25713.25
(or about
713713)
of the peas would have red flowers, so the result of
741741
peas with red flowers is more than expected.
a....
When a scientist conducted a genetics experiments with peas, one sample of offspring consisted of 915...
When a scientist conducted a genetics experiments with peas,
one sample of offspring consisted of 915 peas, with 715 of them
having red flowers. If we assume, as the scientist did, that
under these circumstances, there is a 3 divided by 43/4
probability that a pea will have a red flower, we would expect
that 686.25 (or about 686) of the peas would have red flowers, so
the result of 715 peas with red flowers is more than expected.
a....
When a scientist conducted a genetics experiments with peas, one sample of offspring consisted of 925...
When a scientist conducted a genetics experiments with peas,
one sample of offspring consisted of
925
peas, with
701
of them having red flowers. If we assume, as the scientist
did, that under these circumstances, there is a
3 divided by 43/4
probability that a pea will have a red flower, we would expect
that
693.75
(or about
694)
of the peas would have red flowers, so the result of
701
peas with red flowers is more than expected.
a....
When a scientist conducted a genetics experiments with peas, one sample of offspring consisted of 949...
When a scientist conducted a genetics experiments with peas,
one sample of offspring consisted of 949 peas, with 716 of them
having red flowers. If we assume, as the scientist did, that
under these circumstances, there is a 3 divided by 4 probability
that a pea will have a red flower, we would expect that 711.75
(or about 712) of the peas would have red flowers, so the result
of 716 peas with red flowers is more than expected. a....
When a scientist conducted a genetics experiments with peas, one sample of offspring consisted of 953...
When a scientist conducted a genetics experiments with peas,
one sample of offspring consisted of 953 peas, with 723 of them
having red flowers. If we assume, as the scientist did, that
under these circumstances, there is a 3 divided by 4 probability
that a pea will have a red flower, we would expect that 714.75
(or about 715) of the peas would have red flowers, so the result
of 723 peas with red flowers is more than expected. a....
ADVERTISEMENT
Need Online Homework Help?
Get Answers For Free
Most questions answered within 1 hours.
ADVERTISEMENT
Active Questions
asked 2 minutes ago
asked 3 minutes ago
asked 6 minutes ago
asked 7 minutes ago
asked 8 minutes ago
asked 27 minutes ago
asked 28 minutes ago
asked 45 minutes ago
asked 49 minutes ago
asked 52 minutes ago
asked 54 minutes ago
asked 1 hour ago