Gene flow or migration is the transfer of alleles or genes from one population to another. select the combination of facts that indicate the occurrence of gene flow in the fugate family. i. four of the fugate's seven children had blue complexions. ii. travel in and out of this area was rare in the 1800's, but is more common now. iii. according to doctors, occurrence of the condition is rarely seen anymore. iv. methemoglobinemia at 10-20 percent of hemoglobin can cause blue skin without more serious symptoms. a)i. and iv. b)i. and iii. c)iii. and iv. d)ii. and iii.

The correct answer to this question is B. Some members of the Fugate family had a genetic condition called methemoglobinemia, that gave a blue color to their skin. The gene causing this disease is an autosomal recessive gene, so to have this condition you need to be homozygotes for this recessive gene. Gene flow was prevalent in the Fugate family since not all of the children had blue complexion, but only four of them. The three children that did not have blue complexion, had the dominant allele, probably through gene migration from another population nearby. Also, since it is easier nowadays to travel, two separate populations could meet more easily. This increases the incidence of gene flow and explains the reduction of the occurrence of the condition.

Option B , I. and III.

Explanation:

From statement I and III, it is clear that four children out of seven children suffer from blue skin complexion which is not something very common to occur in a family without any hereditary background. Also the doctors claimed that blue skin issue is rarely seen these days. Thus, there are high chances of acquiring this problem from ancestors (affected or non-affected (carriers))

Therefore, both options I and III depict that some where the origin of blue skin disorder is associated with hereditary of the family.  

Hence, option B is correct

small, big, or no change could occur in the phenotype. it could cause something as simple as a cats ears to curl backwards or something as frighting as death. it could also occur in the protien-coding area and have an effect on that but no effect on the amino acids. what has to occur is a changing in the hox gene or the control gene.

in the year 2850, humans successfully colonized mars. the martian modules that were constructed could hold only a small population of people. it is now a century later, and the population on mars has grown to 600 people. of the current mars population, 45 people express the recessive phenotype for phenylketon- uria (pku) syndrome (pp genotype).

explanation: