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tatiyna
3 years ago
8

10. In which phase will crossing-over occur?

Biology
1 answer:
maxonik [38]3 years ago
7 0

Answer:

C. Prohase 1

Explanation:

It is during prophase 1 of meiosis that crossing over occurs before tetrads or homologues pair of chromosomes are alligned across the equator of metaphase 1. In Meiosis 11, only the sister chromatics will be left or remain and the homologues pair of chromosomes would be moved to separate cells.

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Suppose there are two homologous chromosomes. Each chromosome contains a single mutant allele in different parts of the chromoso
Harlamova29_29 [7]

Answer:

Cross overs can lead to formation of chromosome pairs that have no mutant allele.

Explanation:

Cross overs can lead to formation of chromosome pairs that have no mutant allele.

For example -

Suppose "X" is a mutant  allele and "x" is a mutant free allele.

Now when two homologous chromosomes contains a single mutant allele in different parts of the chromosome are crossed the following offspring are produced

X x

X XX Xx

x Xx xx

"xx" is a mutant free genotype.

Thus, crossing over can create a single mutation-free chromosome

8 0
2 years ago
Cathy's favorite salad dressing is a liquid with particles of the salt pepper and garlic. When comparing a spoonful of salad dre
Murrr4er [49]

Answer:

The liquid would be equivalent to Cytoplasm

The particles would be equivalent to orgnaelles

Explanation:

Cytoplasm is the liquid-like substance in the form of a gel that is also referred to as the protoplasm which is found outside the cell of living things. It is majorly mad up if dissolved molecules and water, as well as several cell organelles that carry out specific functions.

Comparing salad dressing to a cell, the liquid in the salad could be likened to the cytoplasm of a cell, while the particles in the salad could be likened to the organelles in a cell which performs various functions.

6 0
3 years ago
Read 2 more answers
Please help me ASAP!!!
Harlamova29_29 [7]

Why are the seminal vesicles important for human reproduction?

This might help:

The seminal vesicles (Latin: glandulae vesiculosae), vesicular glands, or seminal glands, are a pair of simple tubular glands posteroinferior to the urinary bladder of some male mammals. Seminal vesicles are located within the pelvis. They secrete fluid that partly composes the semen.

They pass through the prostate, and open into the urethra at the seminal colliculus. During ejaculation, semen passes through the prostate gland, enters the urethra and exits the body via the urinary meatus.

I believe that the answer is:

A. 

They allow the sperm to travel to the urethra to be released.

8 0
3 years ago
Please select the word from the list that best fits the definition
goldfiish [28.3K]

Answer:b

Explanation:I am not positive but I think that’s it

5 0
2 years ago
The right and left hepatic ducts emerge from the right lobe of the liver in the porta hepatis and unite to form the:
dexar [7]

Answer:

common hepatic duct

Explanation:

  • The common hepatic duct is formed by the union of the right and left hepatic ducts emerging out from the right lobe of the liver.
  • The right hepatic duct is responsible for draining bile from the right half of the body whereas the left hepatic duct drains it from the left side of the body. 
  • At the junction of the right and left hepatic duct, the common hepatic duct gets formed which then joins the cystic duct and then the common bile duct is formed. 
8 0
3 years ago
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