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dimaraw [331]
3 years ago
11

Why use fingertip to detect braille symbol but not palm of hand​

Biology
1 answer:
lisabon 2012 [21]3 years ago
3 0

Answer:

the fingertip has more censors and nerves connected to the skin as compared to the palm

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When Gregor Mendel crossed true breeding tall plants and true breeding short plants why was it impossible to observe segregation
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Alleles in the F1 must be Tt to have height variety in the F2.
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Does anyone understand what is aerobic respiration and anaerobic respiration? thx
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Anaerobic respiration is respiration using electrons through molecular oxygen.
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Please help soon. Which of the following questions can be answered scientifically?
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Explain Mendel's law of independent assortment and how the 9:3:3:1 phenotypic ratio among the F2 of a dihybrid cross provides ev
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Answer:

Explanation:

Mendel's law of independent assortment state that two different genes assort independently in gamete formation.

To reach this conclusion, one has to do a dihybrid cross. This means that two genes responsible for different traits need to be analyzed at the same time.

1) Starting with a <u>parental generation of a cross between two pure lines</u> (homozygous for both genes) <u>with different traits</u>, a plant with yellow and round seeds (YYRR) and another with green and wrinkled seeds (yyrr). <u>The F1 will be phenotypically homogeneous (</u>yellow and round)<u>, and genotypically heterozygous (</u><u>YyRr</u><u>)</u>.

2) If the individuals from the F1 are crossed with one another,  we have to do a Punnett Square to determine the phenotypic ratio of the F2.

  • If the genes assort independently, the F1 individuals will produce their different gametes with the same probability. Each possible gamete will appear in a 1/4 proportion: YR, Yr, yR, yr.
  • The 9:3:3:1 ratio is a result of analyzing the possible phenotypes that result from the dihybrid cross.

See the attached image for an illustration of the crosses in each generation and the Punnett Square.

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