1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
fiasKO [112]
3 years ago
13

Shell color in clams is thought to be controlled by three different genes (each with two alleles). Shell coloration runs a range

between pure white and dark purple. The addition of dominant alleles makes the shells more purple in coloration, while the addition of recessive alleles makes the shells more white. The majority of clams have shells that are medium purple, whereas the other colors are present, but in fewer numbers. This is an example of:A. quantitative traitsB. incomplete dominanceC. codominanceD. mendelian inheritance
Biology
1 answer:
sergejj [24]3 years ago
5 0

The correct answer is A. Quantitative traits

Explanation:

In genetics, quantitative traits refer to traits or phenotypes (observable traits) that depend on many factors including multiple genes and actions in the environment. These traits differ from other traits because the traits tend to be more diverse in a population. In the case presented, the shell color in clams is an example of a quantitative trait because this phenotype is the result of three different each and each gene contains two alleles which means the color depends on many factors. Additionally, as most quantitative traits there is a higher variation in the phenotype considering clams can have different hues.

You might be interested in
You are a botanist looking at the plant color in a new breed of Snapdragon. The two parent plants are Blue and Green and when yo
irakobra [83]

Answer:

Incomplete dominance is the inheritance pattern where the dominant allele did not mask the recessive allele completely and form a mix of both alleles. Here the inheritance is the incomplete inheritance. The ratio of F2 generation is 1:2:1.

Given:

R1R1 = 42

R2R2 = 39

R1R2 = 86

Total R1 alleles = 2*42+86 = 170

Total R2 alleles = 2*39+86 = 164

Total alleles = 334

Frequency of allele R1 = 170/334 = 0.51

Frequency of allele R2 = 164 / 334 = 0.49

Expected number of each phenotype:

Total population = 167

Blue = R1R1 = 0.51 * 0.51 * 167 = 43.44

Green = R2R2 = 0.49 * 0.49 * 167 = 40.10

Cyan = 2*R1*R2 = 2*0.51*0.49*167 = 83.46

Phenotype     Observed(O)    Expected (E)    O-E      (O-E)2     (O-E)2/E

Blue                 42                   43.44               -1.44       2.0736     0.0477

cyan                86                   83.46                 2.54     6.4516     0.0773

green              39                    40.1                    -1.1       1.2100      0.0302

Total              167                     167                                               0.1552

Chi-square value = 0.155

Degrees of freedom = no. of phenotypes – 1

Df = 3-1 = 2

Critical value = 5.99

Chi-square value of 0.155 is less than the critical value of 5.99. So we accept the null hypothesis.

4 0
3 years ago
What are the relationships that are present between the frequency, wavelength, and amplitude of a wave?
mr Goodwill [35]

Answer:

Wavelength and frequency are inversely proportional to each other. Such that longer waves have lower frequencies, and shorter waves have higher frequencies. The amplitude or height of a wave is measured from the peak to the trough.

5 0
3 years ago
Like all flowering plants, the snapdragon must be pollinated to reproduce, but its flowers are closed. A bumblebee has just enou
Lelechka [254]

Answer:

<h2>Coevolution</h2>

Explanation:

Coevolution : It is the influence of closely associated species on each other in their evolution, they affect each other.

In coevolution , two or more species reciprocally affect  evolution of  each other by natural selection.

 

Coevolution Examples:

There are lots of examples of coevolution, some are here

i) coevolution of Predator-Prey , this relationship is one of the most common examples of coevolution.

ii) coevolution of  Herbivores and plants,

iii)  coevolution of Acacia ants and Acacias and

iii)  coevolution of Flowering Plants and Pollinators and many others.

5 0
3 years ago
10 points!
Gnesinka [82]
I would say the correct answer is B: <span>People tend to overuse or degrade shared resources. It is often not clear how much exploitative pressure a natural resource can sustain before the exploitation becomes unsustainable. So for example, various industries may dispose of waste into a river. The river has a capacity to absorb and clean a certain amount of effluent by natural degradation systems. However, at some critical mass of pollutants, these natural processes are no longer able to function properly, and the river becomes very polluted to a point were the resource cannot be utilised. Monitoring can help to gauge at which point a common resources is becoming unacceptably degraded, and this can guide policy.</span>
7 0
3 years ago
Read 2 more answers
What do astronomers think dark energy is doing to the expansion of the universe?
son4ous [18]

Answer:

Accelerating it.

Explanation:

Dark energy is a hypothesis by which the growing tendency of the universe to expand constantly is explained, with which it is inferred that this dark energy is a kind of inverse gravity, which instead of attracting repels the extremes of the cosmos expanding its size and dimension . Although its definition is very ambiguous and abstract, the truth is that it is a hypothesis that seeks to explain this physical behavior of the cosmos.

5 0
3 years ago
Other questions:
  • although Darwin did not realize it, the variations he observed among the individuals of a population of finches were caused by w
    9·1 answer
  • Surface currents greatly affect the climate in many parts of the world. Please select the best answer from the choices provided
    14·2 answers
  • (not biology is geography question)can I say that the weather conditions. change constantly because of the climate change? Plz d
    8·1 answer
  • A newly discovered gene has two aleles a and a scientists hypothesize that the alleles show incomplete dominance
    7·1 answer
  • is a protein found in blood that is represented by a + or – sign, which affects the compatibility of blood with other blood type
    5·2 answers
  • Street signs around the city of Austin, Texas warn citizens against
    8·1 answer
  • Why are prokaryotes considered to be primitive compared to eukaryotes
    12·1 answer
  • How are photosynthesis and cellular respiration related?
    6·1 answer
  • Types of angiosperms
    13·1 answer
  • In order to use amino acids as fuel, ____________ must occur. This process results in the formation of a(n) ____________ .
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!