If a single mutation turns off the growth of some pairs of legs within an organism, what's most likely affected?

Biology

1 answer:

poizon [28]2 years ago

3 0

Answer is A. A Hox gene

Hox genes are a series of genes that controls the differentiation of cells and tissues in an embryo by turn on and off other genes. If Hox genes express incorrectly, a major changes in the morphology of the individual can be seen.

Let’s understand this with an example: The Ultrabithorax, a Hox gene determines the Third thoracic segment in <em>Drosophila melanogaster</em>. Third thoracic segment displays a pair of legs and a pair of reduced wings used for balancing. In the mutant<em> Drosophila</em> the functional Ultrabithorax protein is absent. Due to this mutation, the third thoracic segment now expresses the same structures found on the second thoracic segment, which contains a pair of legs and a pair of wings which are fully developed .

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The specification of the anterior-posterior axis in Drosophila embryos is initially controlled by various gene products that are

mojhsa [17]

Answer:

It is possible to determine their functions and to identify the mechanism involved in their mode of inheritance

Explanation:

Matrilineal inheritance refers to the inheritance of genes directly from the mother, it either through the inheritance of mitochondrial DNA or by the epigenetic mechanism of genomic imprinting (in the case above indicated, maternal imprinting). By mutating genes which are inherited from the mother it is possible to study their functions as well as their mode of inheritance. By using a reverse genetics approach, many maternal imprinted genes have recently been identified to be involved in embryo development, especially in model organisms like <em>Drosophila</em>.

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Throughout most of human history, human population size _____.

Volgvan

Has been increasing since we started the population

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2 years ago

What is the basic unit of classification and is denoted by a unique two-part scientific name?.

ludmilkaskok [199]

Species is the basic unit of classification denoted by a unique two-part scientific name.

<h3>What is meant by species? </h3>

Species is a name given to a group of organisms which have similar individuals. They are capable of reproducing among themselves and thus exchanging genes among themselves.

Species is the lowest of taxa and is thus the most basic unit of classification. Genus is the next taxonomic rank of the next taxa on the hierarchy of classification.

It is estimated that on earth, there are 8.7 million species living currently. This concept of species is from the times of Aristotle.

Therefore, species is the basic unit of classification denoted by a unique two-part scientific name.