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lys-0071 [83]
4 years ago
13

1.) The stage in mitosis in which chromosomes replicate themselves.

Biology
1 answer:
Nadya [2.5K]4 years ago
8 0

Answer:

CDBABB

Explanation:

I think

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En una isla oceánica aislada hay una especie de pájaros, la
Zinaida [17]

Answer:

La frecuencia del alelo recesivo s es igual a 0.2 (opción b)

Explanation:

<u>Datos disponibles</u>:

  • Plumaje gris es el fenotipo dominante
  • Plumaje con manchas blancas es el fenotipo recesivo
  • S es el alelo dominante para plumaje gris
  • s es el alelo recesivo para plumaje manchado
  • Variedad manchada representa el 4% de la población.

Si ejemplares con ala manchada y genotipo ss representan el 4% de la población, entonces los restantes 96% corresponden a ejemplares grises homocigotas dominantes SS y heterocigotas Ss. Las frecuencias fenotípicas serán:

  • Plumaje gris (SS + Ss) = 96% = 0.96
  • Plumaje manchado (ss) = 4% = 0.04

De acuerdo al equilibrio de Hardy-Winberg, la suma de las frecuencias alélicas equivale a 1, y la suma de las frecuencias genotípicas también equivale a 1.

  • Frecuencia del alelo dominante = p
  • Frecuencia del alelo recesivo = q
  • Frecuencia de genotipo homocigota dominante = p²
  • Frecuencia de genotipo heterocigota = 2xpxq
  • Frecuencia del genotipo homocigota recesivo = q²

Entonces,

  • p + q = 1
  • p² + 2pq + q² = 1

Si la frecuencia genotípica del homocigota recesivo es 0.04, entonces la raíz cuadrada de ese valor es la frecuencia génica del alelo recesivo. Esto es:

  • q² = 0.04
  • q = √0.04 = 0.2

A partir de la ecuación p + q = 1, podemos calcular el valor de p.

p + q = 1

p + 0.2 = 1

p = 1 - 0.2

p = 0.8

Entonces la frecuencia genotípica del homocigota dominante es p²

p² = 0.8² = 0.64

Y la frecuencia genotípica del heterocigota es

2pq = 2 x p x q = 2 x 0.8 x 0.2 = 0.32

Para corroborar esto, la suma de todas las frecuencias genotípicas debe dar uno.

0.64 + 0.32 + 0.04 = 1

5 0
4 years ago
A scientst wants to analyze signals from outer that ell her about the age of the universe. Her lab is equipped with advance sens
iren2701 [21]

The correct answer is "Radio Waves."

The sensors that will provide the best information would be Radio waves.

If the scientist wants to analyze signals from outer that tell her about the age of the universe, the best equipment to do so is Radio waves.

A scientist named Karl Jansky was the first to use radio waves. Today, radio waves help scientists and astronomers to find photons with lesser energy that many times come from the farthest places of the Universe. Current modern telescopes do not have the capacity to see these parts of the Universe and radio waves allow the scientific community to get observe these distant and cold places to do advanced research.

4 0
3 years ago
1. What kinds of evidence can be used to show that a supercontinent once existed?
Fed [463]

1. the continents seemed to be put together like a jigsaw puzzle also the evidence of tectonic plates moving in our crust

2. Continental drift was a theory that explained how continents sift position on earth's surface

3. one of the issues with the theory that geologist at the time had, was that Wegener was not a geologist. He was publishing a theory that wasn't associated with his field of science. The other issue the geologists had was based on the commonly held opinion

4. Continents move about the earth like huge ships at sea, floating on pieces of the earth's outer skin, or crust. New crust is created as melted rock pushes up from inside the planet. Old crust is destroyed as it moves toward the hot rock and melts.

3 0
3 years ago
Which statement is true regarding studies of the empty nest syndrome?
algol13
<span><span>If these are the answers you were able to choose from:

A)Parents who live vicariously through their children are less likely to experience empty nest feelings.
</span><span>B)For most parents, marital satisfaction decreases during the years after child rearing.
</span><span>C)Parents who are heavily invested in their children may suffer from a decline in marital satisfaction after children have left home.
</span><span>D)<span>Marital partners have less time for each other with their children gone.

Then the correct answer would be C - parents who are heavily invested in their children may suffer from a decline in marital satisfaction after children have left home. This also makes sense; they've been parents and not husband and wife. For that reason, following the child's departure, they're not sure what to do with themselves.</span></span></span>
7 0
3 years ago
Why do living cells need water?
drek231 [11]
Water is an essential to constituent of the protoplasm of living cells because it is directly involved in countless biochemical reactions like photosynthesis and respiration. Without it cells couldn’t move waste and by products, take in nutrients, perform intracellular transportation, functioning and signaling.
5 0
3 years ago
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