Hollow lightweight bones benefit the bird by letting it fly. If the bird had regular bones like any other animal, then the bird wouldn't have the ability to be able to fly due to the extra weight.
Answer:
Explanation:
The sickle cell allele is recessive. Hence, in order for any child of the couple to have sickle cell anemia, such a child will have to inherit an affected allele each from the two parents. This means that both the father and the mother must have affected alleles in their genotypes. In other words, two sickle cell alleles are required for the abnormality to manifest.
Let us assume that the sickle cell allele is represented by S and the normal allele is represented by A.
Now, it is established that the mother has sickle cell anemia, her genotype would be SS. The father does not have sickle cell, his genotype can either be AA or AS.
Assuming the genotype of the father is AA:
SS x AA
AS AS AS AS
<em>All the children would be normal in this case.</em>
Assuming that the genotype of the father is AS
SS x AS
AS SS AS SS
<em>50% of the children would have sickle cell while the remaining 50% would be normal.</em>
<u>Therefore, in order to produce children with sickle cell, the father has to be AS, otherwise, he has to be AA.</u>
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Answer:
This is true
These are the 3 factors:
- Planet's Distance To Sun
- Planet's Reflectivity
- Planets Surface (Through Greenhouse Effect)
The thickness of the atmosphere, seems to be part of it, and I belive that is true, as it plays a role in temperature, determening wether if it can help with how warm or cold a planet is.
A planet's distance from the sun definitly plays a role, becuase depending on how far or close a planet is to the sun, the warmer it can be.
Planet's Surface goes through the process of greenhouse effect, causing a(n) planet to be able to get hotter
