1. They might be using the wrong kind of soil for the plants, causing them to die.
2. The new neighbors could be adding something toxic to Bill's grandparents' plants.
3. Maybe what the neighbors are adding to their garden is affecting Bill's grandparents' garden on the other side of the fence.
Answer:
Over hundreds of years
Explanation:
Over hundreds of years i'm pretty sure.
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:
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
To maintain a line of pure-breeding peas, selective breeders would use a technique called artificial cross-pollination. This is a technique were breeders transfer pollen from the anthers of one pea plant (male parent) to a stigma of a flower (female parent).
This technique was developed by Gregor Mendel, the founder of the science of genetics. He was a monk who dedicated his time in research about how genes of plants are carried over through specific species. In his controlled experiment he used the pea plant because they are cheap and readily available from merchants who sold them in different classifications. He also used pea plants because they have the capacity to self-pollinate or cross-pollinate.
I believe it's "pollen".
When the pollen grains are washed down into lakes/rivers, scientists can take a sample of the sediment layers and see what plants were growing at that time. They can then make inferences about the climate and how that affected the plants growing there.
Hope this helps!
