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romanna [79]
3 years ago
15

How do we know that height in humans is a polygenic trait?

Biology
1 answer:
Elena-2011 [213]3 years ago
4 0
We know that height in humans is a polygenic trait because it has a lot of variation. The height gene is controlled by at minimum three genes with six different alleles. If all of these alleles are dominant for the tall gene you will be tall if you are dominant for the short gene you will be short if there is no clear dominance between the two genes you will fall somewhere  in the middle. 
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What is the name of the process by which the cytoplasm divides in two?
Kamila [148]

Answer:

Cytokinesis

Explanation:

All living cells undergo division, it is the method employed in duplicating themselves. The division of cells involves two major processes viz; karyokinesis and cytokinesis.

Karyokinensis involves the division of the genetic material (DNA) in the nucleus. The chromosomes are initially separated into opposite poles/ends inside the cell. After which the cytoplasm of the whole cell then separates resulting in two daughter cells each having its own genetic material. This process is called CYTOKINESIS.

Although CYTOKINESIS occurs in all eukarotes and prokaryotes, the way it occurs in the eukaryotic plant and animal cells differ in the sense that, in animals, it occurs with the formation of a cleavage furrow as a result of pinching inward of the cell membrane until the two daughter cells form while in plants, a cell plate is formed at the cell's centre and a new membrabe and cell wall is formed around each cell plate.

4 0
3 years ago
A few years ago, the labels from one class section's experimental treatments plants fell off in the greenhouse and got swept awa
const2013 [10]

Answer:

The group needs to find signs of apical dominance, growth in response to light, vascular tissue differentiation, formation of lateral and adventitious roots, etc.

Explanation:

Lanolin is a solvent used to study physiological processes in plants by diluting hormone growth regulators (in this case, indole acetic acid). Indole acetic acid (IAA) is the most important auxin hormone in plants. Auxins are essential plant hormones synthesized in expanding shoot tips that move down the stem to the roots. These hormones coordinate cell division, elongation and identity during plant body development. IAA hormone is well known to regulate different plant developmental processes including, among others, apical dominance (where the central stem grows more strongly than other lateral stems), tissue differentiation, stem elongation, phototropism (growth in response to light) and gravitropism (response to gravity). For instance, under the application of IAA, it is expected that bean stems grow to imitate the response to light (phototropism) by bending away from the side where lanolin was applied.

7 0
3 years ago
Raoul practiced a skill for 30 seconds and then rested for 5-seconds between trials. Scarlett practiced the same skill for 30 se
zalisa [80]

Answer:

The correct answer is option B. "Raoul's practice is massed; Scarlett's is distributed".

Explanation:

A massed practice condition is defined as a task that its performed by an individual without taking a significant amount of rest. Since Raoul is only taking 5 seconds of rest between trials, his practice is massed. On the other hand, distributed practice conditions involve resting for longer periods of time. Scarlett is resting 40 seconds between trials, which represents a longer period of time that the trial itself (30 seconds), therefore her practice is distributed.

6 0
3 years ago
1. How would your vision change if rods were selectively damaged by this supervillain?
lisov135 [29]

Answer:

<em>When the rod cells become more involved, affected individuals experience a decreased ability to see at night or in low light situations and may lose the ability to see clearly to the sides </em>

4 0
3 years ago
Bones consist of cells suspended in an extracellular matrix. a bone is a type of
Anastaziya [24]

Th answer is connective tissue.  Bone tissue is made up of different types of bone cells. Osteoblasts and osteocytes are involved in the formation and mineralization of bone; osteoclasts are involved in the resorption of bone tissue. The mineralized extracellular matrix of bone tissue has an organic component mainly made of collagen (ossein) and an inorganic component of bone mineral made up of various salts such as calcium.






8 0
3 years ago
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