Answer:
El síndrome de Down es el resultado de un niño nacido con un cromosoma adicional agregado al número esperado de cromosomas (generalmente destinado a ser 46).
El síndrome de Angelman se produce cuando un niño nace con una mutación en el 15º cromosoma heredado de los padres.
Explanation:
En el síndrome de Down, se agrega un cromosoma adicional al complemento de cromosomas que un niño debe heredar de sus padres. Se supone que un niño tiene un complemento de 46 cromosomas (23 cada uno) de ambos padres. Una vez que hay un aumento en este número, se establece el síndrome de down. Es una condición cromosómica común. Puede manifestarse como una trisomía, causada por la no disyunción durante la división celular, lo que resulta en 3 copias del cromosoma 21 en lugar de 2 copias, mosaicismo, donde una mezcla de células se clasifican en 2 grupos que contienen un complemento completo de 46 cromosomas y el otro un el cromosoma adicional lo hace 47 y la translocación ocurre cuando un cromosoma 21 adicional o parte del 21 se une al cromosoma 14. Los niños generalmente tienen cabezas y orejas pequeñas, cuellos cortos, caras planas, etc.
En el síndrome de Angelman, el cerebro se ve afectado en gran medida, debido al efecto de la mutación en el sistema nervioso. La pérdida de la función en el 15º cromosoma es responsable del síndrome de Angelman, que resulta en la incapacidad del niño para hablar, mantener el equilibrio, moverse, un desarrollo deficiente tanto física como intelectualmente.
Answer:
Frequency of B allele is 0.6681
Explanation:
If p represents the frequency of dominant allele and q represents the frequency of recessive allele, according to Hardy-Weinberg equilibrium:
p + q = 1
p² + 2pq + q² = 1
where p² = frequency of homozygous dominant genotype
q² = frequency of homozygous recessive genotype
2pq = frequency of heterozygous genotype
Given that number of recessive chestnut horse = 28
Total horses = 226 + 28 = 254
frequency of b² genotype = 28/254 = 0.1102
frequency of recessive b allele = √0.1102 = 0.3319
So, frequency of B allele =
1 - 0.3319 = 0.6681
Hence frequency of B allele is 0.6681
During DNA replication, DNA helicase enzymes move in a range of 
along the DNA.
<h3>
What are the benefits of DNA helicase?</h3>
Helicase enzymes are found in all living organisms, from bacteria to humans. They are required for replication and repair of DNA.
Helicases are enzymes that can unwind double-stranded DNA. They are found in all living cells and they play a key role in gene expression, replication and repair.
Helicases are also used for other purposes such as the production of recombinant proteins and the isolation of DNA from cells.
The helicase enzymes have many benefits for humans. For instance, they can break down the DNA from a cell to extract information about it. They also enable us to duplicate our genes so that they are preserved during cell division.
To learn more about DNA helicase, visit:
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Considering the following choices;
A) Behavioral isolation.
B) Reproductive isolation.
C) Genetic isolation.
D) All of the above.
Answer;
D all of the above;
Mating calls, strutting, displays of plumage and coded sounds result in behavioral isolation, reproductive isolation, and Genetic isolation;
Explanation;
Isolation mechanism are those aspects that prevents species or groups of organisms fro reproducing sexually.
Genetic isolation, involves population having a little genetic mixing with other organisms within the same species.
Reproductive isolation is a situation in which different species may live in the same area, but the properties of individuals prevent them from interbreeding.
Behavioral isolation helps members of the same species to identify each other as proper mates.
Answer:
Diffusion.
Explanation:
According to the information given before the example in the question and considering the fact that the bag was secured on both ends before being placed in the solution, provided that there were no holes on the surface of the bag, the iodine solution could have diffused through the bag into the starch solution hence the color change to black after 30 minutes.
I hope this answer helps.
