You are studying two traits in fruit flies: wing shape and eye color. wings can be either bent or straight. eyes can be either red or yellow. straight-winged, yellow-eyed female x bent-winged, red-eyed male gave: 41 bent yellow males 38 bent red females 38 straight yellow males 43 straight red females an f1 bent-winged, red-eyed female x an f1 bent-winged, yellow-eyed male gave: 31 bent red females 10 straight red females 28 bent yellow females 11 straight yellow females 32 bent red males 9 straight red males 29 bent yellow males 10 straight yellow males explain these results and give the genotypes of the parents in each of the crosses.

From the observation, It can be seen that the bent-winged genotype is dominant, while the straight-winged genotype is recessive. Also, for the eye colour, the traits are found on only the X chromosome. This causes the males to inherit their eye colour from their mother, since females are the source of the single X chromosomes in males (XY- male). However, the females inherit their eye colour from their father's X-chromosome. Thus, it can be determined that the eye colour, in this instance, has a cross gender mode of inheritance due to its placement on the X-chromosome.  

Parent phenotype

Take: Bent-wing (B), Straight wing (s), Red eye (R) Yellow eye (Y)

Prime generation parent

Female (Straight-wing, Yellow eye)- s s   Y   (ss- homozygous recessive trait)

Male (Bent-wing, Red eye)- B s   R         (Bs- Heterozygous dominant trait)

1st generation Parent (F1)

Female (Bent-wing, Red eye)- B s     R

Male (Bent-wing, Yellow eye)- B s     Y

the answer is c) an oak tree

why many students visually perceive stem as a vapid class?

for many students, however, stem subjects are optically discerned as vapid, tedious, and destitute of authentic-world applications. science and math have always been a major part of the high school curriculum, but many students have disengaged from these subjects because they don’t optically discern that they have any pertinence to the authentic world or students’ daily lives. for them, math and science have become a set of rules, procedures, laws, theorems, and formulas to memorize. some students even develop math apprehensiveness and cerebrate they are incapable of learning higher-level mathematics.

why is stem paramount?

as the u.s. economy changes, the ordinant dictation for stem-capable workers is growing. in may of 2014, the u.s. bureau of labor statistics counted more than 8.3 million stem jobs, which accounted for 6.2 percent of total employment in the cumulated states. that number is expected to perpetuate to increment as u.s. companies grow and innovate to compete in the ecumenical economy. according to the u.s. department of labor, the average salary for all stem jobs is $85,570, which is virtually double the average salary for all jobs.

many people still envision stem professionals as wearing a white lab coat and conducting research in a laboratory. in authenticity, some of the most in-demand stem fields are petroleum engineering, process engineering, and computer engineering. these fields that are experiencing shortages of qualified candidates are additionally among the highest paying, with the average petroleum engineer earning an annual salary of $147,520 in may 2014 according to the u.s. bureau of labor statistics.

in additament, stem subjects edify students valuable skills that are vital for prosperity in all vocations, even those that do not directly require stem erudition. engagement in stem subjects avails students develop quandary-solving, critical mentally conceiving, and leadership skills. these skills are so ecumenical, in fact, that statistics relinquished in the summer of 2013 by the u.s. census bureau designated that about three-quarters of the people with a bachelor’s degree in stem fields are not working in those vocations. many non-stem employers are poaching stem-qualified job candidates because they are more ingenious and collaborative than their non-stem counterparts.

as the ecumenical economy perpetuates to evolve, the desideratum for stem-capable workers will perpetuate to grow. by getting edifiers and students involved in the stem kineticism, an incipient generation of adroit workers will be poised to energize and expand this exhilarating field.

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