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Tamiku [17]
3 years ago
10

What are centromeres?

Biology
2 answers:
dezoksy [38]3 years ago
7 0

the region of a chromosome to which the microtubules of the spindle attach, via the kinetochore, during cell division
Pls mark me as the brainliest answer plsssssssssssssssssssss
Genrish500 [490]3 years ago
4 0
It is the area where the two chromatids of a chromosome attach to each other
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In garden peas a pure line that is tall with purple flowers is crossed to another pure line that is short with white flowers. Th
defon

Answer:

See the explanation

Explanation:

Answer 1.

As given that in F1 all are short and white then it can be said according to Mendel's law that short and white are dominant over tall and purple.  

Let S for short s for tall and W for white and w for purple allele.

So the genotype of short purple will be Ssww or SSww. So In first case Ssww self crossed then resultant offsprings will be,

................ Sw .................... sw

Sw ........ SSww ............. Ssww

sw ........ Ssww .............. ssww (tall and purple)

So from this 1/4 will be tall and purple while 3/4 will be short and purple.

In second case SSww only short purple progeny will appear.

Answer 2.

2. a) The female progeny will not show any trait because there are two X chromosome in females , so female offspring can be carrier but not show any trait in case of X- linked trait.

2. b) Half of male offsprings show trait because X is inherited from mother. So the chance of having X-linked recessive allele is 1/2.

2. c) The chance of having X linked affect allele in daughter is 1/2. So the chance of inheriting that X to son will be 1/2 so in total there is chance of 1/4 that son will be affected.

2. d) the chance of first child show this trait will be 1/4 in case of male offspring while 0 in case of female offspring.

Hope this helps!

4 0
3 years ago
Which of these are components of blood? (Select all that apply.)
asambeis [7]

Answer:

oxygen gas

red blood cells

platelets

Explanation:

» <u>Concepts</u>

Your blood is composed of four main things: <u>red blood cells</u> (that transport <u>oxygen</u>), <u>white blood cells</u>, <u>platelets</u>, and <u>plasma</u>. Red blood cells transports oxygen and takes out CO2, white blood cells fight bacteria and viruses, and platelets clot together to stop bleeding.

<u>Bile</u> is a fluid that is produced by the liver and stored in the gallbladder, so it's not a main component of blood.

7 0
2 years ago
Read 2 more answers
Some students conduct an investigation in a biology lab by setting up four different artificial stomachs, each in a
Effectus [21]

Answer: D. Digestion increases as the volume of the enzyme increases.

Explanation:

Enzymes speed up reactions by reducing the activation time of a reaction. If there are more enzymes therefore, the reaction will move faster.

Pepsin is an enzyme that prefers acidic conditions so it can work with dilute HCL. It can also work in temperatures of 40 °C without getting denatured. As more Pepsin is added therefore, the reaction will move faster and digestion will increase.

8 0
3 years ago
The Clean Water Act:
Klio2033 [76]

Answer:

the answer is all of the above

4 0
3 years ago
What happens to light energy that is not absorbed?
Ratling [72]
When the light is not absorbed, it would reflect on the object.
6 0
3 years ago
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