The light dependent reactions of photosynthesis are known as…

Questions

The light dependent reаctiоns оf phоtosynthesis аre known аs the Calvin cycle and involve water molecules being split apart.

A fаmily leаrns thаt a harmful genetic cоnditiоn runs in their family. The cоndition is caused by a recessive allele. It develops later in life, but its debilitating effects can be prevented with appropriate treatment. Neither the parents nor the children are showing signs of the condition, but both parents in the family have a parent who has the condition, so they realize they have inherited the allele for the condition from at least one parent, and could potentially have passed it to their kids. There is the possibility that they or their kids could develop the condition depending on what alleles they have inherited. The parents decide that since it would be beneficial to be able to get treatment for anyone in their family who would develop the condition, they will get the whole family screened so medical care can be provided if needed. The genetic counselor they work with explains to them that the allele that does NOT cause the condition (allele N) results in a DNA fragment that is 150 base pairs (bp) long. The allele that can cause the condition (allele n) results in two DNA fragments - one 90 bp long and one 60 bp long. Each individual has two copies of the gene, and it can be determined from their DNA fragments whether each person's genotype is NN, Nn, or nn. The counselor shows them the gel above with their family's results. The DNA ruler in the right side contains DNA fragments that are 50, 100, 150, and 200 bp long for comparison. The DNA was loaded at the top of the gel as shown in the image & the DNA fragments moved toward the bottom. The band in the DNA ruler that is 50 bp long is band [a]. When running the gel, the DNA moved from the top to the bottom of the gel, so the positive charge would have been applied to [b].