Answer:
The correct answers would be natural selection and high genetic variation in the species.
Natural selection refers to the natural phenomenon by which organisms which are better adapted or have survival traits tend to survive and reproduce more in the environment.
It leads to an increase in the frequency of the trait in a population.
Genetic variation refers to the sum total of all the genetic characteristics present in a population. Higher genetic diversity higher are the chances of a population to survive.
Similarly, different sizes of the beaks are the result of high genetic diversity out of which large size beak was favored by natural selection.
Ultimately, the large beak size trait spreads through the population.
1) How to use pedigrees:
They are diagrams in which people are represented by symbols. Circles
represent female and squares represent males.
The bottom line represents the offspring of the couple above it.
Dark symbols are used to indicate someone who is affected with a
genetic condition.
Not colored symbols indicate someone who is NOT affected.
A heterozygote carrier.can be represented as grey color.
2) How traits are inherited:
Humans have 23 pairs of chromosomes (46 chromosomes) because 23 chromosomes are inherited from the father and the other 23 come from the mother.
With 23 sets, you have two copies of each gene. This copies can be different or the same and based on that there could be different traits for the same gene like black, brown or blond hair.
Gonorrhea and chlamydia are both <span>sexually transmitted infections (STI).</span>
Pelvic inflammatory disease (PID) is the common complication of gonorrhea. PID <span>
is an infection of the organs of a women's reproductive system (uterus, ovaries, fallopian tubes, and cervix)</span>
Hello!
Yes, the selection in this case would be natural selection because whales of maximum length are mating naturally on their own choice. We are not maintaining and experimenting on them for the analysis that what will be the size of their offspring, if we do that, that is artificial selection.
Why it is natural selection?
Natural selection is the process where organisms with favorable traits are more likely to reproduce. In doing so, they pass on these traits to the next generation. Over time this process allows organisms to adapt to their environment.
Here both whales are of good size (favorable trait) and have definitely better chances of mating and producing fertile generation.
Hope it helps! :)