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3 years ago

PLEASE HELP THIS IS TIMED

Biology

2 answers:

Tomtit [17]3 years ago

5 0

Answer:

BB and Bb

Explanation:

It's this because the dominant gene is present so either way they're going to have brown hair. If it was two blonde people then bb would be one of the answers if that makes sense.

True [87]3 years ago

3 0

Answer:

Shoud be the answer in the middle

Explanation:

Do a punnett square just to be sure:)

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The table shows the relative size of the genomes (total DNA in the nucleus), number of genes, and number of chromosomes for a va

9966 [12]

You don't show the table...but you should see that the more complex an organism, the more chromosomes and the more genes it has.

A bacteria has a small genome. perhaps it has about 5000 genes. it also has 1 chromosome.

Yeast are more complicated than bacteria. Saccharomyces cerevisiae (the yeast that makes beer, wine and bread, has about 6300 genes and 16 chromosomes.

A human has 46 chromosomes (23 pairs), and has likely around 20,000 genes.

6 0

3 years ago

Read 2 more answers

The cane toad, or Rhinella marina, was introduced to the Hawaiian Islands in 1932 by sugar cane farmers. The farmers released th

butalik [34]

The answer is invasive species.

<span>Invasive species are species that are not native to the specific ecosystem, but they are capable of spreading widely through the ecosystem. This way they can threaten native species of the ecosystem or cause environmental harm.
</span>

<span>After being introduced into the Hawaiian Islands, the cane toads greatly affect local ecosystem. In the new area, they have a few natural predators and are able to spread. If they spread beyond the area they are introduced, they become invasive species which can overgrow native biotopes and are a great threat to the local biodiversity. This could lead to the extinction of some native species.</span>

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3 years ago

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Four scientists observed an area of land that had been cleared of all trees and bushes to make space for a power line. Each scie

otez555 [7]

Answer:

The ecosystem is adversely affected.

Explanation:

The ecosystem is adversely affected due to clearing of all trees and bird population is also adversely affected because these trees are the source of habitat for these birds. When there is large number of birds in an ecosystem so the bird population automatically increases due to the presence of more habitat for the birds so if all the trees are removed so very little population of birds left in that ecosystem and this action leads to great disturbance in the ecosystem.

4 0

3 years ago

11.

pochemuha

Imma say & go with C

6 0

3 years ago

what is the order of three genes (x, y, and z) that are located on the same chromosome, based on the following information? gene

Mekhanik [1.2K]

The recombination frequency between genes is useful to determine the distance between genes and their order in the chromosome. The correct order of genes in this chromosome is X-Z-Y.

<h3>What is the recombination frequency?</h3>

Recombination frequency refers to the probability of crossing-over events occurrence between two genes. There farther genes are from each other, the greater recombination frequency there will be.

Recombination frequencies are also used to determine the distance between genes, and if they are linked or not.

So, if we know the recombination frequencies, we can calculate the distances between the genes and figure the genes' order out.

The map unit is the distance between the pair of genes for which one of the 100 meiotic products results in a recombinant one.

1% of recombination frequency, RF = 1 Map Unit, MU = 1 centiMorgan, cM

Now let us analyze the data

Three genes ⇒ X, Y, Z.
Distance between X-Y = 17% = 17 MU
Distance between Y-Z = 9% = 9 MU
Distance between X-Z = 8% = 8 MU

When the RF is given, we already have the distance between genes.

Now, to put these genes in order, we need to look for the most distant genes. These are probably the ones placed at the extremes of the chromosomal fragment.

In this case, the most distant genes are X-Y. So,

---------X-----------------Y---------

17 MU

Then, we need to place the remaining genes, which are probably between the two extremes genes. To be sure of this position, the addition of these middle genes must equal the distance between the extreme genes.

In our example, we only have one remaining gene Z.

The distance from X to Z = 8 MU
The distance from Y to Z = 9 MU
9 MU + 8 MU = 17 MU which is the distance between X and Y (extreme genes)

-----------X-------------Z----------------------Y---------

║----8MU---║------- 9 MU -----║

║-------------17 MU ---------------║

So, according to this reasoning, the correct order of genes in this chromosome is X-Z-Y.

You can learn more about the recombination frequency at

brainly.com/question/13243739

brainly.com/question/20713958

brainly.com/question/11105396

#SPJ1

3 0

1 year ago