What evidence do scientists offer to support their idea that the African elephants are two different species?

In Marker Analysis, how are STRs related to alleles? Be sure to define each term (STR and allele) and explain how the two result

Lisa [10]

Answer:

The number of STR repeats is unique and therefore it is considered as an allele of that locus

Explanation:

Short Tandem Repeats (STRs), also known as microsatellites or simple sequence repeats (SSRs), are short DNA sequences with a size of 1-6 nucleotide bases which may be many times repeated in tandem. STRs localize in specific regions of the genome (loci) and therefore they are molecular markers. Gel electrophoresis a technique used to separate DNA fragments based on their size. In consequence, the pattern of STR repeats or 'alleles' obtained by electrophoresis can be used to identify individuals. In a gel electrophoresis, STR markers produce different bands that run more slowly or faster on the gel in different lanes according to their size (e.g., more slowly >> higher size of the STR sequence), and thereby STR alleles are unique and serve to identify individuals.

3 0

3 years ago

About one in every 33 babies is born with a birth defect. Not all birth defects can be prevented, but a woman can take steps to

Pani-rosa [81]

Answer:

C

Explanation:

4 0

3 years ago

How many three fourths are in five halves?

marishachu [46]

To know how many $\frac{3}{4}$ are in $\frac{5}{2}$ we can simply divide $\frac{5}{2}$ by $\frac{3}{4}$ .
$\frac{ \frac{5}{2} }{ \frac{3}{4} }$ = $\frac{5*4}{2*3}$ = $\frac{20}{6}$ = $\frac{10}{3}$
final result: 3,3333...

3 0

3 years ago

6. species Closely related of orchids never mate in the wild because they bloom at different times. This is an example of ______

Dimas [21]

Answer:

temporal reproductive isolation

Explanation:

The correct answer would be temporal reproductive isolation.

Reproductive isolation generally refers to series of biological mechanisms or processes that prevent members of different species from mating/fertilization or prevent the product of their mating to be invalid.

Some reproductive isolation processes prevent members of different species from mating or prevent fertilization as a result of mating. These processes are known as pre-zygotic reproductive isolation mechanisms.

Some other processes ensure that the product of fertilization (when it occurs) is invalid. These are known as post-zygotic isolation mechanisms.

A good example of the pre-zygotic reproductive isolation process is when closely related by different species bloom at different times. This will prevent mating or cross-pollination to happen between the different species. This is known as temporal reproductive isolation.

5 0

2 years ago

Match the term with the definition.

maria [59]

Answer:

1.tissue

2.organ system

3.organ

4.cell

5.tissue

Explanation:

1.Tissues are groups of similar cells that have a common function. An organ is a structure that is composed of at least two or more tissue types and performs a specific set of functions for the body. Many organs working together to accomplish a common purpose is called an organ system.

2.Tissues are groups of similar cells that have a common function. An organ is a structure that is composed of at least two or more tissue types and performs a specific set of functions for the body. Many organs working together to accomplish a common purpose is called an organ system.

3.Cells grouped together to perform a specialized function are known as a tissue. Tissues arranged together to perform a special function are known as an organ. Organs that together to perform the many functions of the body as a whole are called a system. ... Any abnormal development of tissues or organs.

4.Molecules are the chemical building blocks of all body structures. A cell is the smallest independently functioning unit of a living organism.

5.Tissue. Word used to denote a living thing. Organism. Level made up of a group of tissue working together. Organ.

6 0

3 years ago