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Pepsi [2]
3 years ago
9

Please explain this. :)

Biology
1 answer:
rosijanka [135]3 years ago
7 0
<span>1. Introduction of a different environmental pressure, like an invasive species or a prolonged natural disaster.
2. Random mutation, where a gene or set of genes in an individual organism is randomly different from the normal type of that gene in the larger population. This individual may gain an advantage from this mutation and its offspring will inherit the advantageous trait.</span>
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In what ethnic group(s) is CF most common? ___________________________ How is CF inherited?
11Alexandr11 [23.1K]

Answer:

Cystic fibrosis (CF) is more common in Caucasian individuals and is inherited with an autosomal recessive inheritance pattern.

Explanation:

Cystic fibrosis (CF) is a condition of genetic origin, which affects organs such as the lungs, pancreas, intestine and liver. CF is characterized by the production of very thick and viscous mucus, and promotes the formation of cysts and fibrosis of the affected organs.

CF is an inherited disease that is transmitted in an autosomal recessive pattern, that is, the altered gene is required to be on both chromosomes of the allelic pair, in order to be expressed.

It is a very common disease in Caucasian individuals, especially those of European descent.

7 0
2 years ago
Seeds contain dense aggregates of starch. what role does water play in how the seeds use the stored starch?
jenyasd209 [6]
Water is needed to break the hydrogen bonds in the starch aggregates, allowing ready access to stored energy.
3 0
3 years ago
Describe how one could experimentally determine whether a bacterium
Kamila [148]

Answer:

How can you determine experimentally whether a bacterium is a psychrophile or a mesophile? incubate two cultures, one around 10°C and the other around 35°C. If it grows in the lower temperature incubator, it is a psychrophile. If it grows in the higher temperature incubator, it is a mesophile.

Explanation:

8 0
2 years ago
Read 2 more answers
The cell type in the liver that absorbs glucose and converts it into glycogen is the:
djyliett [7]
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6 0
3 years ago
A certain Drosophila protein-encoding gene has one intron. If a large sample of null alleles of this gene is examined, will any
Alex

Answer:

a) Yes

b) Yes

c) Yes

d) Yes

Explanation:

a. In the exons?

Yes mutant site will be expected. It will transcript-ed as well and it can be a polypeptide depending on the mutation type.

b. In the intron?

Yes mutant site will be expected. It will be transcript-ed as well and it cannot be a  polypeptide  

c. In the promoter?

Yes mutant site will be expected. It will not be transcript-ed and it cannot be a  polypeptide

d. In the intron-exon boundary?

Yes mutant site will be expected. It will be transcript-ed and it cannot be a  polypeptide

3 0
3 years ago
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