What are the two phases in the m phase

22. A plant geneticist is investigating the inheritance of genes for bitter taste (Su) and explosive rind (e) in watermelon (Cit

mylen [45]

Answer:

See the answer below

Explanation:

Using the formula for calculating Chi square ( $X^2$ ):

$X^2$ = $\frac{(O - E)^2}{E}$ where O = observed frequency and E = expected frequency.

The observed frequencies for the four phenotypes are 88, 62, 62, and 81 respectively.

For the expected frequency, the phenotypes are supposed to assort in 9:3:3:1 according to Mendel ratio.

Hence, expected frequencies are calculated as:

phenotype (1) = 9/16 x 293 = 164.81

phenotype (2) = 3/16 x 293 = 54.94

phenotype (3) = 3/16 x 293 = 54.94

phenotype (4) = 1/16 x 293 = 18.31

The $X^2$ is calculated thus:

Phenotype O E $X^2$

1 88 164.81 $\frac{(88 - 164.81)^2}{164.81}$ = 35.80

2 62 54.94 $\frac{(62 - 54.94)^2}{54.94}$ = 0.91

3 62 54.94 $\frac{(62 - 54.94)^2}{54.94}$ = 0.91

4 81 18.31 $\frac{(81 - 18.31)^2}{18.31}$ = 214.64

Total $X^2$ = 35.80 + 0.91 + 0.91 + 214.64 = 252.26

To the nearest tenth = 252

Degree of freedom = n - 1 = 4- 1 = 3

$X^2$ tabulated = 7.815

<em>The calculated </em> $X^2$ <em> exceeds the critical value, hence, the null hypothesis is rejected. The two genes did not assort independently. </em>

4 0

2 years ago

Which is an abiotic factor that can be found in a rain forest ecosystem?

ss7ja [257]

Answer:

A. Air

Explanation:

Abiotic factors are things that are not living.

Air can be found in a rain forest ecosystem, as it can be found in all ecosystems, but it is not living.

On the other hand, algae, flowers, and animals are biotic instead of abiotic because they are living things.

So, A is the correct answer.

8 0

3 years ago

Red imported fire ants are an ant species native to South America, but were introduced into the US in the 1950s.

Ann [662]

This is (b.) False, because it was actually introduced in the 1930's.

8 0

2 years ago

Have afib and now have been diagnosed with left bundle branch block no cardiac artery disease

GrogVix [38]

Well... I get the felling I know what question you are trying to ask. Atrial Fibrillation is a type of arrhythmia that interferes with the pumping of blood through the Atrium of the heart. A bundle branch block is an interference of the electrical system through the heart. Non of these are particularly that dangerousso don't worry about dying... Though have someone close by in case you go into Cardiac Arrest.

If your worried about getting a heart attack, that is a blood flow problem which can result from CAD. Don't worry though cause the two other condition do not particularly influence the other.

CAD is circulatory, A fib and branch block are electrical.

7 0

3 years ago

Which of the following lists these terms in the correct order from smallest to largest?

sergey [27]

The answer is A because the universe is all of the galaxy’s,solar systems,and planets put into one

5 0

3 years ago