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Luba_88 [7]
3 years ago
9

Research has demonstrated that neural stem cells have an impaired ability to differentiate into functional neurons when subjecte

d to:
Biology
1 answer:
klio [65]3 years ago
8 0
Research has demonstrated that neural stem cells have an impaired ability to differentiate into functional neurons when subjected to ethanol. They found out that treating cultured neural system impairs their ability to differentiate in functioning neurons. With this impairment it seems to be united with aberrant, dense methylation and loci which are active in normal tissue.
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In garden peas, the yellow seed trait is dominant over green seeds. Also, the round seed trait is dominant over the wrinkled-see
Darina [25.2K]

Answer:

405 individuals will be yellow and round seeded.

Explanation:

<u>Available data:</u>

  • the yellow seed trait is dominant over green seeds
  • round seed trait is dominant over the wrinkled-seed trait
  • These genes are on separate chromosomes

Let´s name the seed color genes Y, and the seed shape gene R

  • Y is the dominant allele for seed color expressing yellow
  • y is the recessive allele for seed color expressing green
  • R is the dominant allele for seed shape expressing round
  • r is the recessive allele for seed shape expressing wrinkled

Cross: between two plants that are heterozygous for both traits

Parental)       Yy Rr            x       Yy Rr

Gametes) YR   yR   Yr   yr   YR   yR   Yr   yr

Punnet Square)   YR         yR         Yr         yr

                YR     YYRR     YyRR     YYRr    YyRr

                yR      YyRR      yyRR     YyRr     yyRr

                Yr       YYRr      YyRr      YYrr     Yyrr

                yr        YyRr       yyRr      Yyrr      yyrr

F1) 720 individuals

    9/16 yellow and round seeded individuals, Y-R-

    3/16 green and round seeded individuals, yyR-

    3/16 yellow and wrinkle seeded individuals, Y-rr

    1/16 green and wrinkle seeded individuals, yyrr

<em>Note: the "-" symbol in the phenotypes means that there it could be either a dominant or recessive allele. </em>

If 720 is the total number of individuals in the F1, then:

16 possible genotypes ---------- 100% of the progeny -------- 720 individuals

9 yellow and rounded----------- 56.25% ----------------------------405 individuals

3 green and rounded-------------18.75%------------------------------135 individuals

3 yellow and wrinkled-------------18.75%------------------------------135 individuals

1 green and wrinkled--------------6.25%-------------------------------45 individuals

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I have asked this question 3 times and people keep taking the points :(
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Answer:

When 2 slabs of continental lithosphere collide, it creates mountains.

Explanation:

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3. Organisms that are NOT autotrophs
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Answer:

The answer is D.

Explanation:

Autotrophs are known as producers which gets energy from sunlight and produces their own food.

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Homeostasis refers to an organism's ability to maintain a relatively constant internal environment. If, however, an organism is
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Help awnser the abc ignore the orange thing​
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Explanation:

yes .....................

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