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Ludmilka [50]
3 years ago
9

At what phase does crossover occur in

Biology
2 answers:
vesna_86 [32]3 years ago
8 0

Answer: crossing over happens in prophase 1.

Explanation: ( in Portuguese ) os cromossomas homólogos, na profase 1 da meiose, tocam-se, trocando informações sobre o ADN. A esse processo chama se crossing over.

Basile [38]3 years ago
3 0

Answer:

crossing over happens in prophase 1.

Explanation:

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My doctor told me that birth control pills contain small amounts of estrogen and progesterone, and these hormones prevent me fro
german
Ok... This is a bit complicated but bear with me. In a female's body Estrogen and Progesterone are two of the major used to maintain the menstruation cycle. Gonadotrophic substances are an entirely different topic with it being the hormones FSH and LH (These hormones are released while an egg is in development in the ovaries). 

Without going into even deeper specifics. Estrogen is used by the body signal to ovulate, as well as thicken the uterine walls... Progesterone is used to maintain the uterine walls "after" the egg is fertilized. What the pill is suppose to do is actually force a premature ovulation, which is why there is estrogen. The Progesterone's job as is maintain the uterine wall's endometrium to a low level and helps keep blood loss from a period at a minimum. 

If you need clarification please feel free to question.   
8 0
4 years ago
Review the following list and select either an "H" if the item is a hazard, a "B" if it's a benefit, or "HB" if it can be both a
vampirchik [111]
Pyroclastic flows,lava flows and lahars are hazardous.                                      Geothermal energy is beneficial.   
Volcanic ash and volcanic materials can be both hazardous and beneficial.
Hope this helps you!

8 0
4 years ago
Read 2 more answers
The neurons in the inferior temporal cortex...
Veseljchak [2.6K]

Answer:

C. respond selectively to objects.

Explanation:

The neurons in the inferior temporal cortex are involved in:

  • Responding selectively to the objects.
  • Letter and pseudoword reading
  • Grapheme-phenomic conversion
  • Audiovisual integration of syllabus
  • Presentation of faces pronouncing syllabus.

Hence option C is the right answer amongst the options mentioned.

7 0
4 years ago
Lactase is the enzyme needed to digest lactose, the sugar found in milk. Most mammals produce lactase when they are young but st
Oxana [17]

<u>Option A</u>) A nucleotide substitution in the coding region of the lactase gene that interferes with the interaction between lactase and lactose.

<h3>What mutation causes lactase persistance?</h3>

A mutation in a single nucleotide, in which thymine replaces cytosine, in the region that controls the expression of the lactase gene is what causes the lactase persistence trait.

This mutation first occurred in Hungry, and then it spread out to other regions of Europe, Africa, and Asia.

This mutation allowed humans to digest milk during adulthood.

According to this information, we can assume that the correct option is A). A nucleotide substitution in the coding region of the lactase gene that interferes with the interaction between lactase and lactose.

You can learn more about lactose persistance at

brainly.com/question/3465475

#SPJ1  

8 0
2 years ago
After replication, how much of each DNA molecule is composed of the original DNA?
stiks02 [169]
<span>Because of semi-conservative replication in DNA synthesis, One of the strands of the new DNA molecule is original and one of the strands of the molecule is composed of new nucleic acids.</span>
7 0
3 years ago
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