Answer:
Explanation:
Proteins are found inside the cell. There are proteins in the cell membrane and cytoskeleton, they act as enzymes inside the cell, and they are created inside the cell during protein synthesis at the ribosome.
Since proteins are part of the cell and are made inside the cell, the <u>proteins</u> must be smaller.
The given case describes the situation of emotional arousal.
The emotional arousal is the state, in which the alertness of the body increases due to the increase in the emotions.
In this case, the death of the woman's aunt, leaves a emotional remark to her. As she knows that smoking causes lung cancer, she feels very emotional and quits smoking.
Answer:
12%
Explanation:
The genes E/e and F/f are 24 cM apart.
- E_: elongated wings
- ee: small wings
- F_: five stripes
- ff: four stripes
A distance of 24 cM means that the frequency of recombination between the two genes is 24%.
The cross Ef/eF x ef/ef would produce the following offspring:
- Ef/ef: Parental; elongated wings and four stripes
- eF/ef: Parental; small wings and five stripes
- EF/ef: Recombinant; elongated wings and five stripes
- ef/ef: Recombinant; small wings and four stripes
The total percentage of recombinant gametes is 24%, and there are two possible recombinant gametes, so each of them appears in 12% of the cases.
The individuals with elongated wings and five stripes have the recombinant genotype EF/ef, therefore the percentage of the offspring with this phenotype is 12%.
A reflex arc is a neural pathway that controls a reflex. In vertebrates, most sensory neurons do not pass directly into the brain, but synapse in the spinal cord.
Afferent nerve fibers carry signals from the somatic receptors to the posterior horn of the spinal cord or to the brainstem.
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Answer:
Because of homologous recombination
Explanation:
- When genes are establish on different DNAs or far apart on the same chromosome, they are classified self-sufficiently and are said to be unlinked.
- When genes are very close together on the same chromosome, they are said to be linked. That means that alleles, or genetic versions, that are already together on a chromosome will be inherited as a unit more often than not.
- We can see if two genes are linked, and how closely, by using data from genetic crosses to calculate the frequency of recombination.
- Using the technique of discovery recombination happenings for numerous gene pairs, we can make link maps that show the order and relative distances of the genes on the chromosome.
- When the genes are on the same chromosome but far apart, they are classified independently due to crossing (homologous recombination). This is a procedure that happens at the start of meiosis, in which homologous DNAs randomly exchange matching fragments. Crossing be able to connection new alleles in combination on the same chromosome, causing them to enter the same gamete. When the genes are far apart, the crossing occurs with sufficient frequency for all types of gametes to occur with 25% percentage frequency.
- When the genes are very close together on the same chromosome, the crossing still occurs, but the result (in terms of the types of gametes produced) is different. Instead of being classified independently, genes tend to "stay together" during meiosis. That is, alleles of genes that are already together on a chromosome will tend to pass as a unit to gametes. In this case, the genes are linked
