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never [62]
2 years ago
13

During Mendel's second set of experiments, he allowed the F1, offspring from the first experiments to self-pollinate. Which of t

he following best describes the results? O A. About 25% of the Fz offspring expressed a different version of the studied trait than the parents had. O B. All the F2 offspring expressed a different version of the studied trait than the parents had. O C. All the F2 offspring expressed the same version of the studied trait as the parents had. D. About 25% of the Fz offspring expressed the same version of the studied trait as the parents had.​
Biology
2 answers:
elena-14-01-66 [18.8K]2 years ago
4 0
The answer is B. I did this question yesterday.
myrzilka [38]2 years ago
4 0

Answer:

B

Explanation:

A P E X

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28
seraphim [82]

Answer:

o think this question is asked two times right

3 0
3 years ago
11. How does active transport differ from all other forms of transportation?
Nastasia [14]

Though both active transport and passive transport involve ion movement and use ion channels to move ions across the cell membrane, in or out of the cell.

Passive Transport (or Diffusion) moves ions from high concentration to low, using no metabolic energy. Active Transport moves ions from low concentration to high, using metabolic energy in the form of ATP.

So the answer is C.

8 0
3 years ago
Read 2 more answers
In the rat, the allele for red eye colour is dominant over the alleles for brown colour. Consider a cross between a rat that is
chubhunter [2.5K]

Answer:

1) RR x rr

2) Shown below

3) 100% Rr with red eyes

4) Punnett square shown (Rr x Rr)

5) 25% of the offspring are h0m0zygous dominant with red eyes (RR), 50% are heterozygous with red eyes (Rr), and 25% are h0m0zygous with brown eyes (rr)

Explanation:

Let's say the allele for red eyes is R and the allele for brown eyes is r.

1. A cross between a h0m0zygous dominant (two copies of the dominant allele, R) and h0m0zygous recessive (two copies of the recessive allele, r) is: RR x rr

2.                            R                  R

                  r          <em>Rr                Rr</em>

                 

                  r          <em>Rr                Rr</em>

<em />

The F1 generation is shown in the Punnett square above.

3. The F1 generation are 100% Rr. They are heterozygous. Since red (R)                     is dominant, the rats all have red eyes

4. A cross between the F1 generation (Rr x Rr) gives the F2 generation

                              R                  r

                  R         <em>RR              Rr</em>

                 

                  r          <em>Rr                rr</em>

<em />

5. 25% of the offspring are h0m0zygous dominant with red eyes (RR), 50% are heterozygous with red eyes (Rr), and 25% are h0m0zygous with brown eyes (rr)

6 0
3 years ago
true or false a cell makes a copy of its DNA during the stage of the cell cycle call mitosis if false what is the word or statem
ahrayia [7]
False. DNA is copied during the "S" phase.
7 0
3 years ago
What does labor need contractions for
zvonat [6]

Answer:

A contraction is when the muscles of your uterus tighten up like a fist and then relax. Contractions help push your baby out. simple as that

Explanation:

7 0
2 years ago
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