In a monohybrid cross, if the gene for tall (t) plants was incompletely dominant over the gene for short (t) plants, what would be the predicted result of crossing two intermediate (tt) parent plants? (hint: you may want to complete a punnett square.)
1) 25 percent tall, 50 percent intermediate, 25 percent short
2)50 percent tall, 25 percent intermediate, 25 percent short
3)100 percent intermediate
4)25 percent tall, 75 percent intermediate

Option 1

Explanation:

It is given that gene for tall (T) is dominant over gene for short i.e t

Thus , if T and t are present together in an allele pair then the individual would be an intermediate species.

Genotype of both the parents - Tt

Tt * Tt

TT, Tt, tt, Tt

Thus out of four offspring one is tall. Thus probability of tall species is 25%

out of four offspring one is short. Thus probability of short species is 25%

out of four offspring two are intermediate. Thus probability of intermediate species is 50%

Hence, option  1 is correct

c.) polymerase chain reaction

- "unlike the original dna fingerprinting method, dna profiling does not use restriction enzymes to cut the dna. instead it uses the polymerase chain reaction (pcr)? to produce many copies of specific str sequences. pcr is an automated procedure that generates lots of copies of a specific sequence of dna."

answer: ice crystals in air

the water from the water body or another source of water gets evaporated as water vapor as an effect of heat on water. these water vapor rises in the upper layers of the earth atmosphere under high atmospheric pressure. the atmospheric pressure of these water molecules starts to decrease due to the effect of cold air. the invisible water vapor condenses into visible water droplets and ice crystals.these ice crystals and water droplets being less denser than the surrounding air floats on air as clouds.