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3 years ago

Which is a reason cells divide

1 answer:

6 0

Cells divide for many reasons. For example, when you skin your knee, cells divide to replace old, dead, or damaged cells. Cells also divide so living things can grow. When organisms grow, it isn't because cells are getting larger.

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Two independently segregating genes determine kernel color in wheat. Red color results from at least one dominant allele in both

Lera25 [3.4K]

Answer:

a) The expected phenotype of the F1 plants is 100% RrBb, red kernels.

b) The expected phenotypic classes in the F2 are: 9:3:3:1

9/16 R-B-, 3/16 rrB-, 3/16 R-bb, 1/16 rrbb

Proportions 9:6:1.

9/16 Red kernel (R-B-), 6/16 Brown kernel (rrB- + R-bb), 1/16 White kernel (rrbb)

Explanation:

Available data:

red kernel: R-B-

brown kernel: R-bb or rrB-

white kernel: rrbb

1º Cross) RRBB x rrbb

F1) 100% RrBb (red kernels)

2ºCross) RrBb x RrBb

Gametes) RB RB

Rb Rb

rB rB

rb rb

Punnet Square) RB Rb rB rb

RB RRBB RRBb RrBB RrBb

Rb RRBb RRbb RrBB Rrbb

rB RrBB RrBb rrBB rrBb

rb RrBb Rrbb rrBb rrbb

F2) Phenotypic classes:

9/16 R-B-

 3/16 rrB-

 3/16 R-bb

 1/16 rrbb

Phenotypic proportions:

9/16 Red kernel (R-B-)

6/16 Brown kernel (rrB- + R-bb)

1/16 White kernel (rrbb)

7 0

3 years ago

1. Is sneezing and coughing on clothes better than using tissue paper?

Rom4ik [11]

Answer:

1. no because the bacteria will stik on your clothes

2. yeah

7 0

2 years ago

8. How are anatomical structures used by scientists to determine how related organisms are

ivolga24 [154]

Answer:

they use it to determine whether or not the animal is related by the bone structure and the structure of the body

7 0

1 year ago

What did you find the most interesting about the rotation and the revolution of the Earth?

lilavasa [31]

Answer:

please give me brainlist and follow

Explanation:

The Earth also moves around the sun. ... So the Earth rotates around its axis as it revolves around the sun. It takes the Earth 365 days, or one year, to complete a revolution. Leftover momentum from when planets were forming makes the Earth, and all planets in the solar system, rotate and revolve.

7 0

3 years ago

Consider a population of cells that doubles every hour and begins with cells. What is the rate of growth of the cell population

ehidna [41]

<h2>Rates of Population Growth</h2>

Explanation:

Growth is precisely defined for microbes as increment in number of cells, not size
Development rate is change in cell numbers per unit time. Age time is the time it takes for a cell to double. Also called doubling time.
Development rates allude to the rate change of a particular variable inside a particular time span and given a specific setting.
r = (births-passings)/populace size or to get in rate terms, simply increase by 100
The populace is so a lot greater, a lot more people are included. In the event that a populace develops by a consistent rate for every year, this inevitably indicates what we call exponential growth..

8 0

3 years ago