Answer:
While penetrance is a quantitative estimate, reduced expressivity (transmission) is a qualitative estimate.
Explanation:
<u>Penetration
</u>
Some individuals who carry the deleterious allele (for example, in an autosomal dominant disease) do not show the expected phenotype: in that case we say that the penetrance is incomplete. This is the case in which the number of individuals presenting an abnormal phenotype is less than the number of individuals carrying the mutation causing this phenotype. Penetrance is a quantitative estimate.
For example, in the case of neurofibromatosis type I, its penetration is estimated to be 80% although it is often difficult to detect mild variants of the disease. Therefore, in these cases it would be useful to be able to detect the different mutations in the affected families and thus establish more precisely the value of their penetrance.
<u>Expressiveness (transmission)</u>
The observed phenotype can be more or less severe among the different affected individuals. In this case it is said that the deleterious allele has a variable expressiveness. Expressiveness is a qualitative estimate.
In the case of Marfan syndrome, for the same mutation present in a family, some individuals show a severe form of the disease that affects the cardiovascular, ocular and skeletal system while others show only a high height and arachnodactyly, without eye problems or of aortic aneurysm.
Reduced penetrance and incomplete expressivity are mainly described in autosomal dominant diseases.
Do not confuse an isolated case due to poor penetrance with a sporadic case due to the appearance of a mutation.
In a way, it was the creation of the punnet square and the start of understanding gene pools. He also learned how to manipulate there traits.
Answer:
chimpanzees
Explanation:
humans chimpanzees gorillas orangutans and their extinct ancestors humans chimpanzees gorillas orangutans and their extinct ancestors form of the family of organisms known as the hominidae. Researchers generally agree among the living animals in this group, humans are most related to chimpanzees judging from comparisons of anatomy and genetics.
D. diversity of the resources in the habitat.
Explanation:
The deforestation brings in lot of problem, much more than it brings in benefits for the humans on the long run. Once a forest is totally destroyed, the habitat suddenly loses the majority of its resources, especially for the organisms that are consumers. The soil too gets rapidly degraded, so the majority of the producers too find it very hard and takes them long time to reestablish themselves.
Having the diversity of resources dwindle, the organisms suffer badly. All living creates need resources in order to survive, so once they don't have them they die out. This unfortunately happens all over the world, with the tropical rainforest habitats being the most endangered, especially in the Amazon, Congo, and Southeast Asia.
