Is the general term for a grouping of organisms

Two autosomal genes, J and K, are 60 map units apart. You perform the following testcross: J K / j k x j k / j k. At what freque

Dmitry [639]

Answer:

J K / j k = 20%

j k / j k = 20%

J k / j k = 30%

j K / j k = 30%

Explanation:

To calculate the recombination frequency, we have to know that 1% of recombinations = 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 of them results in a recombinant one.

So, en the exposed example:

J and K are autosomal genes

J and K are separated by 60 M.U.

60 M.U. means that there is 60% of recombination.

Cross) J K / j k x j k / j k

Gametes) JK Parental jk, jk, jk, jk

jk Parental

Jk Recombinant

jK Recombinant

One map unit equals 1% of recombination frequency. This means that every 100 meiotic products, one of them is a recombinant one.

1 M.U. -------------- 1% recombination

60 M.U. ------------ 60% recombination

30% Jk + 30% jK

100 M.U. - 60 M.U. = 40 M.U.

40M.U.--------------40 % Parental (Not recombinant)

20% JK + 20% jk

Punnet Square) JK jk Jk jK

jk JK/jk jk/jk Jk/jk jK/jk

J K / j k = 20%

j k / j k = 20%

J k / j k = 30%

j K / j k = 30%

3 0

3 years ago

What features of plants allow them to live in hot conditions?

yarga [219]

Answer:

Small leaves

Explanation:

These ensure that less water is lost from the plant by transpiration because the leaf has a smaller surface area.

4 0

3 years ago

What is the purpose of cells?

Nezavi [6.7K]

Explanation:

Hey there!

The main function of cell is to make a life possible in the universe by performing various type of vital activities.
Various type of cell performes various type of activities. The same type of cell combine together to form tissue. Similarly, similar tissue combine and form organ. Now, Organs combinly form form a system and all system form a whole body. They combinly perform task for sustaining life in the universe.
Cancer are caused mainly due to abnormal growth of cells. It shows various type of symptoms. Such as;

The wounds donot heal faster, instead it may be worse.
Unwanted bleeding may occur from nose, mouth, or other parts.
You may see lump in some parts of body.(Thickness of skin).
They also may have problem of hair loss in more amount.

Hope it helps...

5 0

3 years ago

What is a gene?

Dafna1 [17]

Answer:

your answer is D) A section of DNA that codes for a specific trait

Explanation:

4 0

3 years ago

1. How does the body adjust to a higher altitude?

Anni [7]

During acclimatization over a few days to weeks, the body produces more red blood cells to counteract the lower oxygen saturation in blood in high altitudes. Full adaptation to high altitude is achieved when the increase of red blood cells reaches a plateau and stops.Heart rate is controlled by the two branches of the autonomic (involuntary) nervous system. The sympathetic nervous system (SNS) and the parasympathetic nervous system (PNS). ... At the beginning of exercise, your body removes the parasympathetic stimulation, which enables the heart rate to gradually increase.

D)all of them

8 0

3 years ago