Answer:
Number of heterozygous population 64
Explanation:
Given data:
Total population of chicken 200
Number of chicken having featherless legs 128, that represent q2 (as they are homozygous recessive)
Total number of chickens = 200
Therefore, the value of 
so q = 0.8, and
p = 1 - q
= 1 - 0.8 = 0.2
The frequency of
Therefore, Number of heterozygous population
Answer:
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Explanation:
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Great Wall of China, Chinese (Pinyin) Wanli Changcheng or (Wade-Giles romanization) Wan-li Ch’ang-ch’eng (“10,000-Li Long Wall”), extensive bulwark erected in ancient China, one of the largest building-construction projects ever undertaken. The Great Wall actually consists of numerous walls—many of them parallel to each other—built over some two millennia across northern China and southern Mongolia. The most extensive and best-preserved version of the wall dates from the Ming dynasty (1368–1644) and runs for some 5,500 miles (8,850 km) east to west from Mount Hu near Dandong, southeastern Liaoning province, to Jiayu Pass west of Jiuquan, northwestern Gansu province. This wall often traces the crestlines of hills and mountains as it snakes across the Chinese countryside, and about one-fourth of its length consists solely of natural barriers such as rivers and mountain ridges. Nearly all of the rest (about 70 percent of the total length) is actual constructed wall, with the small remaining stretches constituting ditches or moats. Although lengthy sections of the wall are now in ruins or have disappeared completely, it is still one of the more remarkable structures on Earth. The Great Wall was designated a UNESCO World Heritage site in
Explanation:
Hope it's heplful
Answer:
B. Operant conditioning
Explanation:
In psychology, the term operant conditioning refers to a form of learning by reinforcements and punishments.
According to this, a reinforcement is an stimulus that increases the probability that a certain behavior takes place again in a future, so, <u>when the individual is presented with this stimulus, the behavior will be more likely repeated in the future and it will happen more often.</u>
In this example a child smiles and gains attention, <u>the reinforcement would be the gaining of attention, which would be the stimulus that is making the child to begin to smile more often</u>. Gaining attention is something desirable and pleasant for the child so it's a reinforcement for the conduct of smiling.
Therefore this is an example of b. operant conditioning.
Mr. Lopez is most likely seeing how much the students have improved over the years.
