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LenKa [72]
3 years ago
8

The elongated part of a neuron that is normally covered by a myelin sheath is known as the _[blank]_.

Biology
1 answer:
givi [52]3 years ago
6 0

The myelin sheath insulates the axon

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A true-breeding plant with green pods and wrinded seeds is crossed with a plant that is heterozygous for both traits. Drawa
AlekseyPX

The possible genotype would be when one of the parent is homozygous dominant -    Phenotype ratio= 16:0,  genotype ratio= 1 YYRR : 1YYRr: 1 yYRR: 1 YyRr.

when one of the parent is homozygous recessive the phenotype ratio is 4 yellow and round : 4 yellow and wrinkle : 4 green and round : 4 green and wrinkle and genotype ratio = YyRr:  Yyrr: yyRr: yyrr  or

1:1:1:1   genotype ratio.

Explanation:

The data given:

yellow and round dominant ---  Y R

Green and wrinkle recessive ---- yr

It is given a true breeding plant, which means the parent plant is homozygous for the trait. Let one of the parent be YYRR

Also it is given that it was crossed with heterozygous parent so the other parent be YyRr

The cross between them is shown in punnet square as:

       YR        Yr          yR           yr

YR  YYRR   YYRr    yYRR     YyRr

YR   YYRR   YYRr    YyRR    YyRr

YR   YYRR   YYRr    YyRR    YyRr

YR   YYRR   YYRr    YyRR    YyRr

4 YYRR: 4 YYRr: 4 YyRR: 4 YyRr

thus genotype ratio is 1:1:1:1

phenotype ratio all 16 are yellow and round.

In case when either parent is homozygous recessive is crossed with heterozygous parent. The punnet square for this is shown as:

yyrr X YyRr

      YR        Yr        yR      yr

yr YyRr     Yyrr     yyRr   yyrr

yr YyRr     Yyrr    yyRr    yyrr

yr YyRr     Yyrr   yyRr     yyrr

yr  YyRr     Yyrr  yyRr     yyrr

4 YyRr: 4 Yyrr: 4yyRr: 4yyrr

1:1:1:1   genotype ratio

phenotype ratio =  4 yellow and round : 4 yellow and wrinkle : 4 green and round : 4 green and wrinkle.

Thus phenotype ratio is 1:1:1:1

 

7 0
4 years ago
What evidence was provided for localized functions inherent to specific anatomical brain structures during execution of behavior
marissa [1.9K]

The fMRI is now the most commonly used method of learning about brain structure.

Functional magnetic resonance imaging (fMRI) is a type of brain scan that uses a magnetic field to create images of brain activity in each brain area.

The fMRI detects the amount of blood flow in each brain region, and thus is an indicator of neural activity. Very clear and detailed pictures of brain structures can be produced via fMRI.

The advantage of the fMRI is that it is noninvasive, fMRIs are substantial and they are now available in many university and hospital settings. The fMRI is now the most commonly used method of learning about brain structure.

Our words are bound by an invisible grammar which is embedded in the brain.

  -Jonah Lehrer, in Proust Was a Neuroscientist.

To learn more about Functional magnetic resonance imaging (fMRI) here

brainly.com/question/12078873

#SPJ4

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2 years ago
What is the substance that is made up of dna and protein tightly packed together?
garri49 [273]
Eukaryotic chromosomes contain both DNA and protein tightly packed together to form Chromatin.
5 0
4 years ago
What is the difference between river velocity and river volume?
inessss [21]
Velocity is how fast the river is moving, the Volume is how much is in the river!
3 0
4 years ago
When Mendel crossed true-breeding pea plants that have inflated pods (PP) with those that have constricted pods (pp), it was obs
laila [671]
The correct answer is A. The phenotype of the F1 generation exhibit all inflated pods since allele P which characterizes inflated pods is the dominant trait. They only carry the allele p which characterizes constricted pods but they will not exhibit the trait. This recessive trait is masked by the presence of the dominant trait.
4 0
3 years ago
Read 2 more answers
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