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3 years ago

Traits that are determined by more than one gene are called what?

1 answer:

3 0

A polygenic trait is one whose phenotype is influenced by more than one gene. Traits that display a continuous distribution, such as height or skin color, are polygenic.

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Explain why one city receives 10 hours more light each day.<br>Explain your answer

aleksandrvk [35]

Answer:

i hope it will help u bestie

Explanation:

Each year, many people look forward to the winter solstice, which usually falls on December 21 and is the shortest day of the year, because they know after that, there will be progressively more daylight each day.

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3 years ago

Difference between air pollution and soil pollution

Misha Larkins [42]

Answer:

Soil pollution- Soil pollution is defined as the presence of toxic chemicals in soil

it could pose a threat to humans, etc...

caused by the presence of xenobiotic chemicals

(A xenobiotic is a chemical substance found within an organism that is not naturally produced or expected to be present within the organism.)

or other alteration in the natural soil environment. It is typically caused by industrial activity, agricultural chemicals or improper disposal of waste.

Air pollution- Air pollution is a mixture of solid particles and gases in the air.

Car emissions, chemicals from factories, dust, pollen and mold spores may be suspended as particles.

Explanation:

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3 years ago

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water molecules can pass into a cell ,while larger molecules cannot.which feature of a cell allows this to be true?

Kaylis [27]

The feature that allows this to happen is a semipermeable membrane (selectively permeable membrane). This allows the cell to decide what gets in, it allows things like hydrocarbons and oxygen and water to pass, but prevents large sugars from getting in. The process of water passing through the holes in osmosis which is the diffusion of water across this semipermeable membrane.

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3 years ago

In mice, black coat color (B) is dominant over brown (b), and a solid pattern (S) is dominant over white spotted (s). Color and

jenyasd209 [6]

Answer and Explanation:

It is a dihybrid cross, where:

B= black (dominant)

b= brown

S= solid (dominant)

s= spotted

a) The genotype of the parents are:

homozygous black spotted= BBss ⇒ Gametes: Bs, Bs, bS, bS

homozygous brown solid= bbSS ⇒ Gametes: bs, bs, bs, bs

The F1 mice is the resultant progeny from the cross BBss x bbSS. We combine the games of the parents and all combinations are : BbSs. All F1 genotype is BbSs (heterozygous black and solid mice).

b) The testcross is carried out between F1 mice (BbSs) and brown spotted mice (bbss)

BsSs ⇒ Gametes: BS, Bs, bS, bs

bbss ⇒ Gametes: bs, bs, bs, bs

From the gametes, we obtain all the possible combinations:

BSbs = BbSs (black, solid) ⇒ ratio= 1/2 x 1/2= 1/4

Bsbs= Bbss (black, spotted) ⇒ ratio= 1/2 x 1/2= 1/4

bSbs= bbSs (brown solid) ⇒ ratio= 1/2 x 1/2= 1/4

bsbs= bbss (brown spotted) ⇒ ratio= 1/2 x 1/2= 1/4

So, we obtain 1/4 of black solid mice (BbSs), 1/4 of black spotted mice (Bbss), 1/4 of brown solid mice (bbSs) and 1/4 of brown spotted mice (bbss).

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3 years ago

In a resting state, sodium (Na^+) is at a higher concentration outside the cell and potassium (K^+) is more concentrated inside

german

Answer: B. increase

Explanation: During an action potential, the potassium level inside the cell decreases, and the sodium level inside the cell increases. Thats is to say there is an outflow of potassium and an inflow of sodium ions.

Action potential usually occurs when an electrical signal disrupts the balance of Na+ and K+ within a cell membrane, briefly depolarizing the concentrations of each.

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3 years ago

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