Answer:
C. Crossing over would sometimes, but not always, exchange the positions of A and a, and of B and b, on homologous chromosomes.
Explanation:
Crossing over involves the exchange of chromosomal segments (and of course the respective genes on the chromosome segments) between non-sister chromatids in a tetrad during meiosis.
From the attached image, crossing over would sometimes exchange the positions of A and a, and that of B and b on the chromosome. However, this is not the case 100% of the time.
The correct option is C.
Answer:
B. There is a moderate variation in birth weight.
Explanation:
The graph shows the "Number of Babies" on its<em> y-axis</em> and the "Weight in Pounds" on its x-axis. The line graph shows that the re is a moderate variation in birth weight and that occurs when the line of the graph starts to go up after 2.5 pounds and starts going down after 6.5 pounds. Then, the number of babies becomes constant again upon reaching 10.5 pounds.
Letter A <em>(There is no variation in birth weight) </em>is false. The weight in pounds on the y-axis shows a variation from 1 pound to 13 pounds and it also shows that many babies have a 6.5-weight in pounds. So, there is clearly variation here.
Letter C <em>(Variation changes over time)</em> is false. There is no indicator of time in the graph. It only shows two variables.
So, this explains the answer.
Answer:
Human blood type exhibits codominance as well as normal Mendelian inheritance (known as dominant/recessive)
Explanation:
Neither the A gene nor the B gene is dominant to the other. They both share in the phenotype AB blood type. Think of co-captains of a team sharing responsibilities.
A and B are both dominant to O which is recessive. If a person inherits A & O they have blood type A. Likewise, if a person inherits B & O they have blood type B. Only if they inherit O & O (homozygous recessive) will they have type O blood.
Answer:
What occurs when too much of a population rely on something?
This leads to overcrowding after which competition sets in and it would diminish the resources and death of the unfit organism while the fittest survives.
Explanation:
