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Rama09 [41]
3 years ago
15

In humans there are 3 alleles that determine blood types: A, B, O. An individual with the genotype AB has type AB blood. This ty

pe of gene expression is known as
A. incomplete dominance
B. sex-linked
C. codominance
D. complete dominance ​
Biology
2 answers:
S_A_V [24]3 years ago
8 0
C. codominance! is the answer
andrezito [222]3 years ago
5 0

Answer:

C, codominance

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In snow-bound, where does the speakers sense of hope come from?
Katarina [22]

Answer:

Heaven

Explanation:

5 0
3 years ago
In a population, surrounded with dark gray rocks, there lived 2 types of beetles, a gray beetle and a white beetle. In the start
Svetlanka [38]

Directional selection favors one of the extreme phenotypes over the other one. <u>Option C is correct</u>. Natural selection is the evolutive force, and 0.40, 0.40, and 0.20 are the new genotypic frequencies.

<h3>What is directional selection?</h3>

Directional selection is one type of natural selection. Let us remember that natural selection is an evolutive force.

Directional selection increases the proportion of individuals with an extreme phenotypic trait.

There must be a selective pressure or environmental pressure acting on populations to lead the species to increase the number of individuals expressing that extreme phenotype.

This selection presents more frequently in those cases in which interactions between living organisms and the environment modify in the same direction.

In the exposed example,

  • two original phenotypes ⇒ gray and white
  • substrate color ⇒  dark gray rocks
  • environmental pressure ⇒ birds preying on beetles

- Grey beetles managed to camouflage with rocks since their gray color was similar.

- White beetles were exposed on the dark gray rocks, so they were easily seen by birds.

- Predation by birds was an environmental pressure that had a stronger influence on the white phenotype.

Natural selection favored gray-colored beetles, who could survive and reproduce.

Assuming a diallelic gene expressing complete dominance codes for beetles color, we can suggest that the frequency of one of the homozygous genotypes increased, while the other decreased to near cero. Heterozygous individuals kept the allele coding for the white phenotype.

Among the options, <u>C is the correct one</u>. Natural selection is the evolutive force, and 0.40, 0.40, and 0.20 are the new genotypic frequencies.

You can learn more about natural selection and  directional selection at

brainly.com/question/9830102

brainly.com/question/12226774

#SPJ1

7 0
2 years ago
Put the stages of cell cycle in order help
Jlenok [28]
The order is : interphase, prophase, metaphase, anaphase, telophase & cytokinesis.
5 0
3 years ago
Fossils show how the complexity of living organisms has changed over time. Gerobatrachus hottoni was a unique organism that live
lara31 [8.8K]

The correct answer is transitional.  

Gerobatrachus refers to an extinct genus of amphibamid temnospondyl, which thrived in the initial Permian, that is, about 290 mya, in the region, which is now known as Baylor County, Texas. The transitional form of fossils are those that demonstrate the intermediate form between the two distinct living species, it could be in a form of an ancestor and its descendants. It is considered that the frogs and salamanders have evolved from a common ancestor of primitive amphibian tetrapod subclass known as Temnospondyli.  


4 0
3 years ago
Differentiate between Exotic and Indigenous<br>breed​
jenyasd209 [6]

Answer:

indigenous species are native species of a country and bred in the same country by similar species. Exotic species are species that are brought from other countries bred within same varieties or crossed with indigenous or other exotic species.

Explanation:

8 0
3 years ago
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