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Effectus [21]
3 years ago
15

Variation in a trait is a required condition for natural selection to act on a population for that trait. Assuming a population

of organisms only started with only one form of a trait, what are two ways variation in the trait could be introduced into the population?
Biology
1 answer:
Sveta_85 [38]3 years ago
4 0

Answer:

I) Sexual reproduction

II) Mutation

Explanation:

Variations refer to the difference observed within organisms of the same species. Variation are introduced into a population by:

- new genetic combinations that occur during sexual reproduction (i.e during meiosis)

- mutations, spontaneous changes that occur in genes and chromosomes.

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List four real-life scenarios where the human body may have to undergo lactic fermentation.
BaLLatris [955]
Cheese, yogurt, buttermilk, sour cream, and pickles are lactic acid fermenters. Yogurt and cheese both start with a source of sugar (i.e., lactose from milk).

Hope this helped
4 0
3 years ago
Zooming in on an object makes it look farther away than what it really is.<br> True or False
gregori [183]
False because zooming in makes it seem bigger so you can see more details. Zooming out would make it look farther away than what it really is
6 0
3 years ago
On the planet Kermit, in the Muppet population, there are two autosomal loci of interest. The first locus has alleles A and a, a
astra-53 [7]

Answer:

The values that most closely represent the expected number of Janice blonde-haired offspring is 252 individuals, option C.

Explanation:

<u>Available data</u>:

  • Two diallelic genes acting in a recessive epistatic manner to express hair color
  • Allele A is dominant over the allele a
  • Allele B is dominant over the allele b
  • A_B_ Cookie monster blue
  • aaB_ Elmo red
  • __bb Janice blonde

When talking about epistasis, we are referring to an interruption. These are interactions between genes located in different loci in the same chromosome. An epistatic gene can alter, influence, or suppress the expression of a hypostatic gene. When the epistatic gene is recessive, the interaction is known as <u>recessive epistasis</u>.  

Observing the altered phenotype proportions of the offspring can reveal which interaction is operating in the trait determination.  

In recessive epistasis, the proportion is 9:3:4.

Cross: Between two doubly-heterozygous

Parentals) AaBb    x    AaBb

Phenotype) Cookie-monster blue-haired individuals

Gametes)  AB, Ab, aB, ab

                 AB, Ab, aB, ab

Punnett square)     AB       Ab        aB         ab

                 AB      AABB    AABb  AaBB    AaBB

                 Ab      AABb    AAbb   AaBb    Aabb

                  aB     AaBB     AaBb   aaBB    aaBb

                  ab     AaBb      Aabb   aaBb    aabb

F1) 1000 individuals

     9/16 individuals are expected to be Cookie-monster blue-haired, A-B-

     3/16 individuals are expected to be Elmo Red, aaB-

     4/16 individuals are expected to be Janice blond, A-bb + aabb

16 ------------------------------------------- 1000 individuals

4 Janice blond individuals ---------- X = 250 individuals

So, 250 individuals are expected to be Janice blonde. The observed number might vary a little bit from this value.  The values that most closely represent the expected number of Janice blonde-haired offspring is c = 252 individuals

5 0
3 years ago
An explosive eruption by a single volcano can affect?
vodka [1.7K]
The air quality for miles because of all the ash released during the eruption and the lava flow can destroy a lot of plant and animal life on the area suronding the volcano
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5 0
3 years ago
When an individual is exercising heavily and when the muscle becomes oxygen-deprived, muscle cells convert pyruvate to lactate.
garik1379 [7]

Here is the complete question

When an individual is exercising heavily and when the muscle becomes oxygen-deprived, muscle cells convert pyruvate to lactate. What happens to the lactate in skeletal muscle cells?

A. It is converted to NAD+.

B. It produces CO2 and water.

C. It is taken to the liver and converted back to pyruvate.

D. It reduces FADH2 to FAD+.

E. It is converted to alcohol.

Answer

C. It is taken to the liver and converted back to pyruvate

8 0
3 years ago
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