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4 years ago

What two new activities did neolithic people engage in

Biology

1 answer:

MAXImum [283]4 years ago

8 0

The Neolithic marks the period when our specie developed farming and domesticated animals.

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Cephalization allows animals to:

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<span>a. Gain information about their environment

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3 years ago

What is the composition of earths atmosphere

gogolik [260]

The earth's atmosphere consists mainly of nitrogen and oxygen with smaller proportions of other gases such as carbon dioxide. The amount of carbon dioxide in the atmosphere is maintained through a balance between processes such as photosynthesis, respiration and combustion. However this balance is being affected by human activities which are polluting the atmosphere.

The proportion of these gases in the atmosphere is as follows: nitrogen is the most abundant at 78%, oxygen is next at 21%, while others include carbon dioxide at 0.037% and argon at 0.9 % .

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4 years ago

if a mutation only occurs in someone’s skin cells due to UV radiation, is it possible for this mutation to be passed onto their

FinnZ [79.3K]

It is possible to be passed on because of their gentics.

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3 years ago

A water molecule is composed of two hydrogen atoms and one oxygen atom arranged in a bent shape. Since oxygen is significantly m

Zigmanuir [339]

Polar molecule, hope it helped

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3 years ago

The cross over frequency between linked genes C and D is 40%; between A and D is 35%; between C and A is 5%; between A and E is

nlexa [21]

Answer: The first line shows the Correct order of genes in the chromosome and the second and third lines show the distances between genes.

C ------------ A ---------------------------------- E -------------------- D (Correct order)

/-----5MU--//---------------25 MU-----------//---------10MU-----/ (Distances)

/------------------------------------40 MU ------------------------------/ (Total distance)

Explanation:

We need to know that 1% of recombination frequency = 1 map unit = 1cm. And that the maximum recombination frequency is always 50%.

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

The recombination frequencies between two genes determine their distance in the chromosome, measured in map units. So, if we know the recombination frequencies, we can calculate distances between the four genes in the problem and we can figure the genes order out. This is:

Recombination frequencies:

1% of recombination frequency = 1 map unit (MU)

C-D = 40% = 40 MU

A-D = 35% = 35 MU

C-A = 5% = 5 MU

A-E = 25% = 25 MU

E-D = 10% = 10 MU

Now that we know the distances between pairs of genes, we need to figure out which is the correct order in the chromosome.

C and D are the genes with the biggest distance between them (40MU), which probably means they are in the extremes. The rest of the genes are in the middle.

C ------------------ (40MU) --------------------------------------- D

A is 5 MU apart from C and 35 MU apart from D, which means it is closer to C.

C------ (5MU)----A------------------------------(35 MU)-------D

E is 25 MU apart from A and only 10 MU apart from D, which means it is between A and D, and closer to D

C--------------------A------- (25 MU)---------E----(10MU)-----D

The sum of C-A distance + A-E distance + E-D distance equals the C-D distance. This is:

C-A 5MU + A-E 25MU + E-D 10MU = C-D 40 MU

5 + 25 + 10 = 40

In conclusion, the correct order of the genes in the chromosome is

C ------------ A ---------------------------------- E -------------------- D

/-----5MU--//---------------25 MU-----------//---------10MU-----/

/------------------------------------40 MU ------------------------------/

8 0

3 years ago