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suter [353]
3 years ago
8

There are four steps in bacterial conjugation. The second step is missing in this list.

Biology
1 answer:
soldier1979 [14.2K]3 years ago
3 0
The plasmid is cut in 2 by a relaxosome at a place called the origin of transfer which is how you require the desired dna.
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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
Samuel visited an ecosystem. he found that the weather is very hot and dry, the entire land is surrounded by sand, and the plant
Triss [41]
The answer is <span>b. desert biome </span><span />
5 0
3 years ago
What are the consequences of the cane toad thriving and overpopulating?
Allisa [31]

Answer:

Well for any animal thriving and overpopulating it can cause lack of food, damaged ecosystems, and disease.

Specifically the cane toad thriving and overpopulating can cause death from their toxins and sense they are one of the biggest toads, they can effect bigger animals and even humans, lowering the population of another species and damaging an ecosystem.

Explanation:

Hope this helped

4 0
3 years ago
Which of the following is a characteristic of protein synthesis in prokaryotes?
slega [8]

A characteristic of protein synthesis prokaryotes... Letter A
7 0
3 years ago
Read 2 more answers
I WILL GIVE YOU BRAINLIEST!!!
amid [387]

Answer:

A. Scorpions, ticks, and mites are invertebrates.

They aren't echinoderms, annelids, or vertebrates.

8 0
3 years ago
Read 2 more answers
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