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Verizon [17]
3 years ago
13

To find a gene, you have to associate a phenotype with a genotype (e.g. all individuals with white flowers have a certain allele

). it is much harder to find genes that are involved in polygenic traits than it is to find the genes responsible for discrete traits. why? it's much more difficult to determine the dna sequence of alleles associated with polygenic traits. the alleles associated with polygenic traits are usually co-dominant. polygenic traits results from extensive gene by gene interactions, which makes finding individual genes difficult. it's harder to find one of the many genes involved in a polygenic trait vs. the only gene involved in a discrete trait..
Biology
1 answer:
irga5000 [103]3 years ago
5 0
It's harder to find one of the many genes involved in a polygenic trait vs the only gene involved in a discrete trait.
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B. A family of foxes arrived on the island after the rabbits were released. No
Juli2301 [7.4K]

The carrying capacity is affected by dense dependent and dense independent factors. 1) During the fourth year. 2) Negative impact. K decreased from 200 to 100 rabbits.  

<h3>What is carrying capacity?</h3>

Carrying capacity -K- is the capability of the environment to support a growing population.

It is a constant that coincides with the population size at which natality and mortality rates are equal. This is the equilibrium point.

Commonly, environments have limited resources, and as the population grows, resources are consumed faster, leading to an increase in the competition rate.

Per capita growth rate decreases as population size, N, increases.

  • If the N < K, the population can still grow.

• When N approximates to K, the population's growth speed decreases.

• When N = K, the population reaches equilibrium,

• When N > K, the population must decrease in size because there are not enough resources to maintain that size.

The carrying capacity might be affected by limiting factors, which might be

  • density dependent (for example, competition, predation, etcetera)
  • density independent. This last case refers to dense-independent factors, among which we can mention human impact or natural disasters (fires, volcanic eruption, flooding).

In the exposed example, when referring to rabbit's carrying capacity, we can assume it is limmited by intraspecific competition and by predation.

  • <u>Population size </u><u>between the 1st and 2nd years</u>

At first we can see that during the first two years, the number of rabbits increased until it was a little bit over 200 individuals.

  • <u>Population size </u><u>between the years 2, 3 and 4</u>

During the second, third, and fourth year, the number of rabbits was kept around 200 individuals, which leads us to assume that K = 200 rabbits.

  • <u>Population size </u><u>the fourth year</u>

However, in the fourth year, there was a sharp decrease in the number of rabbits. Probably this event was due to the arrival of foxes (predators) on the island.

  • <u>Population size</u><u> after the fourth year</u>

In the presence of foxes, the number of rabbits varied around 100 (K = 100).

According to this information, we can assume that only intraspecific competition (related to resources) had a significant role during the first years.

But with the foxes' arrival, the rabbits' carrying capacity decreased from 200 to 100, meaning that, during the following years, predation strongly influenced the rabbits' carrying capacity.  

<em>1) During what year did the foxes most likely arrive? </em>

During the fourth year

<em>2) How did the arrival of the fox family impact the carrying capacity of the rabbit population on this island? </em>

Foxes had a negative impact on the foxes' carrying capacity. It decreased<u> from k = 200 to k = 100 </u>since the foxes arrival to the island.

You can learn more about carrying capacity at

brainly.com/question/2375972

brainly.com/question/14194197

#SPJ1  

4 0
2 years ago
The way that neurons communicate is through _____________ _________________ which release _________________ .
Ne4ueva [31]

The way that neurons communicate is through synaptic vesicles which release neurotransmitters.

<h3>What are Neurons?</h3>

The neurons are the basic structural and functional unit of the nervous system.

These neurons are able to communicate to each other through the neurotransmitters that are released by synaptic vesicles.

The neurotransmitters are chemical messengers that carry chemical signals from one neuron to another upon the generation of an action potential.

The synaptic vesicles are the organelles that house these neurotransmitters.

Learn more about neurons here:

brainly.com/question/13061744

#SPJ1

5 0
2 years ago
Energy that is transferred in waves or particles. Energy from the source.
expeople1 [14]

Answer:

A.Radiation is the answer

6 0
3 years ago
A inhibitor of carbonic anhydrase would: a) interfere with oxygen binding to hemoglobin. b) increase blood pH. c) increase the a
aleksklad [387]

Answer:

All the answers are correct

Explanation:

An inhibitor of carbonic anhydrase would  interfere with oxygen binding to hemoglobin, increase blood pH due to increased H+,  increase the amount of bicarbonate formed in the blood and decrease the amount of carbon dioxide dissolved in plasma.

Carbonic anhydrase catalyses the reaction between carbon dioxide and water to form carbonic acid. Carbonic acid dissociates to form hydrogen carbonate ions and hydrogen ions. The hydrogen ions combine with haemoglobin to form weak haemoglobinic acid.

7 0
3 years ago
An organism's allele combination is called the
jeka57 [31]

Answer:

phenotype

Explanation:

Within an individual organism, the specific combination of alleles for a gene is known as the genotype of the organism, and (as mentioned above) the physical trait associated with that genotype is called the phenotype of the organism.

8 0
2 years ago
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