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3 years ago

Select all that are true. A short tandem repeat (STR):

Biology

1 answer:

Thepotemich [5.8K]3 years ago

7 0

Answer:

C. Is a repeated sequence of DNA in a non- coding sequence

D. Can be composed of a variable number of repeats in different people

Explanation:

Short Tandem Repeats (STRs) are short DNA motifs, i.e., short nucleotide repeat units (generally 2-7 base pairs in size) that may have a different number of repeats among individuals (alleles). Polymorphic STR sequences are very useful genetic markers and therefore they are used for different purposes, e.g., for constructing genome linkage maps, identification of individuals and/or populations, paternity testing, etc. For example, in the USA, the Combined DNA Index System (CODIS) is a databank that stores different DNA profiles based on 13 core STR loci which are used in forensic identity testing.

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Which of the following statements correctly describes a difference between bacterial cells and animal cells?

klasskru [66]

The difference between bacterial cells and animal cells is that animal cells have a membrane surrounding their nucleus while bacterial cells do not have membrane surrounding the nucleus.

DIFFERENCE BETWEEN BACTERIA AND ANIMAL:

Bacteria and animal are both living organisms, however, they are distinct in the possession of membrane bound organelles.

Bacteria are prokaryotic organisms meaning that they do not possess a membrane-bound nucleus in their cells.

On the other hand, animals are eukaryotic organisms meaning that they possess a membrane-bound nucleus.

Therefore, the difference between bacterial cells and animal cells is that animal cells have a membrane surrounding their nucleus while bacterial cells do not have membrane surrounding the nucleus.

Learn more: brainly.com/question/15329345?referrer=searchResults

4 0

3 years ago

Read 2 more answers

For those whose identity is _____, their gender identity corresponds with their birth sex.

Stels [109]

Answer:

For those whose identity is similar/the same, their gender identity corresponds with their birth sex.

Explanation:

6 0

3 years ago

Please I need help with my homework I have to turn it in tomorrow morning

Sophie [7]

Answer:

Some factors that may cause a decrease in population size:

- a high mortality rate due to an infectious disease

- a low birth rate

- a high mortality rate due to interspecific competence

- a high emigration rate

Explanation:

In biology, population size (N) refers to the total number of individuals in a given population. The four main factors that affect population size are birthrate (natality), death rate, immigration rate (i.e., the number of individuals of a given species that move into a population), and emigration rate (i.e., the number of individuals of a given species that move out of a population). Both birthrate and immigration are known to increase N, while death rate and emigration are rates known to decrease this value.

6 0

3 years ago

What is a macromolecule

Sphinxa [80]

Answer:a molecule containing a very large number of atoms, such as a protein, nucleic acid, or synthetic polymer.

Explanation:

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3 years ago

Complete the unfinished DNA strand from attached, and which m-RNA strand would be formed from the finished DNA strand?

Murrr4er [49]

Since in DNA adenine(A) pairs with thymine(T) and guanine(G) pairs with cytosine)

The missing letters are TGCAT

in RNA thymine(T) is replaced with uracil(U)

so the complementary mRNA strand is

ACUGCAU

7 0

3 years ago