Skin color in a certain species of fish is inherited via a single gene with four different alleles. One fish of this type has alleles 1 and 3 (S1S

and its mate has alleles 2 and 4 (S2S4). If each allele confers a unit of color darkness such that S1 has one unit, S2 has two units, and so on, then what proportion of their offspring would be expected to have five units of color?
A) 1/4
B) 1/5
C) 1/8
D) 1/2
E) 0

Answers

Answer 1

Answer: The answer is D) 1/2.

If each allele confers a unit of color darkness, then only genotypes S2S3 and S1S4 will have 5 units of color darkness because in genotype S2S3 S2 will have 2 units, and S3 will have 3 units, which is 5 units in total. The similar math is for genotypes S1S4.

Now, let's cross S1S3 and S2S4:
Parents: S1S3 x S2S4
Offspring: S1S2 S1S4 S2S3 S3S4

The offspring with genotype S1S2 will have 3 units of color darkness. The offspring with genotype S1S4 will have 5 units, as well as the offspring with genotype S2S3. The offspring with genotype S3S4 will have 7 units.
It can be assumed that only 2 genotypes out of 4 will have 5 units:
2/4 = 1/2.

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Why are living organisms more common in the littoral zone than in the benthic zone?

Answers

Living organisms are more common in the littoral zone than in the benthic zone simply because the littoral zone is shallow and well-lit water that is obviously nearer to the shore compare to benthic that is at the very bottom of the aquatic biomes and is made up of sand and organic sediments.

Answer:

Onedge

The littoral zone has a greater biodiversity than the benthic zone because the littoral zone can support plant life. The benthic zone has less light penetration than the littoral zone, so plants cannot thrive in it. The variety of plant life in the littoral zone provides a habitat and food resources for other aquatic animals, which accounts for the greater biodiversity of the littoral zone.

Which structure is represented by letter A?Choose 1 answer:

(Choice A)
Cell membrane

(Choice B)
Ribosome

(Choice C)
Cytosol

(Choice D)
Flagellum

Answers

Answer:

Explanation:

It's a ribosome.

:) (Gutschriften)

Answer:

Choice B- Ribosomes

Explanation:

From the figure of a bacterial (prokaryotic) cell (most probably), The Ribosomes are spiky organelles [Marked as A], that are embedded in the Cytosol [Marked as B] of the cell, bounded by the Cell Membrane (wall) [Marked as C] and the cell moves in all directions with a help of its tail-like structure called Flagellum [Marked as D].

Which one of these statements about cell division is not accurate? A. Everything gets divided among four daughter cells. B. Damaged tissue can be repaired. C. Growth of a multicellular organism can occur. D. This is one part of the cell cycle.

Answers

Cell division is a growth and development process that occurs in living organisms.

The statement'damaged tissue can be repaired' (option B) is not accurate about cell division.

In cell division, a process called meiosis enables the cell to divide and share its contents equally among four cells.
Cell division (mitosis) also allow for the growth of the individual through an increase in cell formation and is just a part of the cell cycle.

Learn more: brainly.com/question/12235365

A statement that is not accurate is B) Damaged tissue can be repaired.
Damaged tissue is not able to be repaired.
Hope that helps,
~Liesel3327

How do the stages of mitosis look

Answers

this is how the stages of mitosis look like

Which of the following must unicellular organisms do to maintain homeostasis? A. Specialize cells to perform specific functions
B. Organize cells into tissues
C. Use chemical signals to communicate between its cells
D. Change food or sunlight into useful energy

Answers

The answer is C. Homeostasis is the process within a cell which aims at maintaining equilibrium within the cell. All living cells exhibit this process. Homeostasis happens by detecting and responding to slight changes in the normal processes inside the cell. Homeostasis occurs by regulating the movement of substances in and out of the cell to maintain a stable concentration inside the cell. It uses chemical signals to communicate between its cells.

Which of the following statements is true concerning LUCA? (1) LUCA was a cell. (2) All life on Earthevolved from LUCA. (3) LUCA probably existed probably around 4.5 billion years ago.
a. 1 only
b. 2 and 2
c. 1 and 2
d. 1, 2, and 3

Answers

2 and three. LUCA was an organism

I'm guessing you meant
b. 2 and 3 :)

If that was the case, then the answer is b.

I hope this helped.

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