Answer:
The cross that guarantees a height trait ratio in the offspring of 1 : 1 high/low is Hh X hh (option C).
Explanation:
For a characteristic such as size, where tall (H) is the dominant trait and short (h) is the recessive, the crossing of a tall heterozygous (Hh) individual with a short one will have a probability that half of the offspring will be tall and the other half short.
This can be demonstrated with a Punnett square:
Cross Hh X hh
Alleles H h
h Hh hh
h Hh hh
Based on this result, half of the offspring will be tall, with genotype Hh, and the other half short, with genotype hh, which corresponds to a tall : short ratio of 1 : 1.
In the other options is not possible to obtain this result:
<em>A) HH Xhh = 100% Hh.</em>
<em>B) hh X hh = 100% hh.</em>
<em>D) Hh X Hh = 50% Hh, 25% HH and 25% hh.</em>
Robust australopithecines are also known by the genus (b) paranthropus.
Australopithecines are the sub-tribe of the tribe Hominini. Now extinct, these are the close ancestors of humans now. They have small body and small brains but they could walk on two legs (bipedal movement). They are considered to be the result of adaptive radiation.
Paranthropus are the extinct forms. They has two popular species: P. robustus and P. boisei. They has strong and tough skulls, bipedal and also omnivores. They has strong muscles for chewing but also possessed the teeth for the herbivores to grind. There are evidences that they used the tools made out of bones and also has the knowledge of fire.
To know more about Australopithecines, here
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Focus because it means <span> the point beneath Earth's surface where rock breaks under stress and can cause an earthquake to happen.</span>
It would be a plant cell. Only plant cells have cell walls and chloroplasts.