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rewona [7]
3 years ago
11

Although there are 61 codons in the universal genetic code that specify amino acids, most organisms possess fewer than 45 differ

ent tRNAs. Some tRNAs can be used to read different codons due to flexibility in the base pairing of the mRNA codon and the anticodon. These "wobble" base pairs allow for non Watson Crick hydrogen bonding, and therefore allow a single tRNA to read multiple codons. Which of the following best describes the structural basis of the wobble hypothesis?1. The pairing of the third (3') base of the mRNA codon and the third (3') base of the tRNA anticodon are less constrained by base stacking.2. The pairing of the first (5') base of the mRNA codon and the third (3') base of the tRNA anticodon are less constrained by base stacking.3.The pairing of the first (5') base of the mRNA codon and the first (5') base of the tRNA anticodon are less constrained by base stacking.4. The pairing of the third (3') base of the mRNA codon and the first (5') base of the tRNA anticodon are less constrained by base stacking.
Biology
1 answer:
Inessa05 [86]3 years ago
4 0

Answer: 4

Explanation:

The pairing of the third (3') base of the mRNA codon and the first (5') base of the tRNA anticodon are less constrained by base stacking.

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George Beadle concluded that teosinte is the likely ancestor of maize (corn), even though the two plants appear very different.
Oliga [24]

Answer:

Option B

Explanation:

ALL options are as follows -

a. teosinte and maize can produce fertile hybrids.

b. teosinte and maize have similar chromosomes.

c. Both Teosinte and maize have naked, soft kernel.

d. Teosinte and maize can produce fertile hybrids

Solution

Beadle started working on maize genetics since 1962 after joining graduate school at Cornell University.  

During his research he found that the chromosomes of teosinte and maize possess higher similarity and also show signs of intercross ability of the two species and hence confirmed that wild teosinte is an ancestor of domesticated maize.  

He later concluded that there are only 4 to 5 genes that make these two species different from each other rest all is similar.  

Option B is correct

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4 years ago
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What is photosynthesis?​
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Colt1911 [192]

Answer:

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Explanation:

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Part A - Independent assortment of three genes A wild-type tomato plant (Plant 1) is homozygous dominant for three traits: solid
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<h2>Law of independent assortment </h2>

Explanation:

  • There are 8 distinct phenotypes, each one has a 12,5% of appearance: Since M=solid leaves D=normal height P= smooth skin.
  • Recessive gene characters can only be taken in homozygous recessive mmddpp.  

      1. MmDdPp: M=solid leaves D=normal height P= smooth skin.

     2. MmDdpp M=solid leaves D=normal height pp= peach skin.

    3. MmddPp M=solid leaves dd=dwarf height P= smooth skin.  

    4. Mmddpp M=solid leaves dd=dwarf height pp= peach skin.

    5. mmDdPp mm=mottled leaves D=normal height P= smooth skin.  

    6. mmDdpp mm=mottled leaves D=normal height pp= peach skin.  

    7. mmddPp mm=mottled leaves dd=dwarf height P= smooth skin.  

   8. mmddpp mm=mottled leaves dd=dwarf height pp= peach skin.

Hence,The answer is all eight possible phenotypes from the cross MmDdPp x mmddpp are equally likely, resulting in a phenotypic ratio of 1:1:1:1:1:1:1:1

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