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natulia [17]
3 years ago
12

The two sides of the DNA helix are held together by

Biology
2 answers:
nirvana33 [79]3 years ago
8 0

Answer:

The two sides of the DNA helix are held together by

Sergeeva-Olga [200]3 years ago
6 0
Hydrogen bonds I believe is the right answer
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A true-breeding plant with inflated pods and yellow pods is crossed with a plant that has constricted and yellow pods. Draw a
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Answer:    Sysy ×  Sysy  i.e. <em>all are genotypically heterozygous, inflated, and yellow</em>

Explanation:

Punnett squares are a diagrammatic means of determining traits of hybrid offspring produced via crosses in genetic breeding. The parental genotypes and phenotypes are usually known, and these typically follow standard Mendelian ratios and inheritance.

Mendelian genetics focus on trait inheritance, or heritability. These traits are packaged out into its own gamete, inherited by themselves and often show dominance, where one's effect may mask those of another trait.

These are called the Law of Segregation, Independent assortment and Dominance respectively.

For this cross...

Parent generation or P generation:

gametes: Y → pod color green dominant (Y), yellow recessive (y)

                S→ pod size; inflated dominant (S), constricted recessive (c)

Assumptions...

  • True breeding plants are homozygous, with identical sets of alleles
  • The other parent is heterozygous, as it was not said to breed true

P generation:                          SySy  × sysy

<em>                             yellow,  inflated    </em>× <em> yellow,  constricted</em>

<em></em>

F1 generation:                           Sysy ×  Sysy              ...(from punnet square)

<em>phenotype</em><em>:        yellow,  inflated    </em>× <em> yellow,  inflated </em>

<em></em>

<em>∴ all are genotypically heterozygous, inflated, and yellow</em>

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a layer of water just under a frog's skin captures oxygen from air or water and delivers it to blood vessels at the skin's surfa
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Answer:

Frogs breathe through water through their skin. This means their entire skin is their respiratory system in a way. If they submerge themselves in dirty and impure water, they'll become very easily sick and die.

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