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padilas [110]
2 years ago
11

The _________ is both the mechanical weight-bearing base of the spinal column and the fused central posterior section of the pel

vic girdle.
Biology
1 answer:
Fynjy0 [20]2 years ago
7 0
The answer to this question is the sacrum. The sacrum is a triangular bone that forms the base of the spinal column. This bone has a vital role in the skeletal system and also supports the weight of the upper body of a person and this bone and many nerves are inside the sacrum.
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2 years ago
In tomato plants, the allele for purple stems is dominant to allele for green stems and the allele for red fruit is dominant to
Kamila [148]

So let's call the allele that is dominant for purple stems is P, and the recessive allele yielding green stems is p. And let's say that the allele that is dominant for red fruit is R and the recessive allele for yellow fruit is r.


The two plants are each heterozygour for both traits, meaning that the cross is going to be:


PpRr x PpRr


So let's setup a Punnet Square:


\left[\begin{array}{ccccc}&PR&Pr&pR&pr&PR&PPRR&PPRr&PpRR\4&PpRr&Pr&PPRr&PPrr&PpRr&Pprr\\pR&PpRR&PpRr&ppRR&ppRr&pr&PpRr&Pprr&ppRr&pprr\end{array}\right]


The genotypic ratios (alleles) and phenotypic ratios are as follows:


PPRR (Purple stem, Red fruit): \frac{1}{16}


PpRR (Purple stem, Red fruit): \frac{2}{16} or \frac{1}{8}


ppRR (Green Stem, Red fruit): \frac{1}{16}


PPRr (Purple stem, Red fruit): \frac{2}{16} or \frac{1}{8}


PPrr (Purple stem, Yellow fruit): \frac{1}{16}


PpRr (Purple stem, Red fruit): \frac{4}{16} or \frac{1}{4}


pprr (Green stem, Yellow fruit): \frac{1}{16}


ppRr (Green stem, Red fruit): \frac{2}{16} or \frac{1}{8}


Pprr (Purple stem, Yellow fruit): \frac{2}{16} or \frac{1}{8}


So then we take the like phenotypic ratios and add them together:


Purple stem, Red fruit: \frac{1}{16} +\frac{2}{16} +\frac{2}{16} +\frac{4}{16}=\frac{9}{16}


Green stem, Red fruit: \frac{1}{16}+ \frac{2}{16} =\frac{3}{16}


Purple stem, Yellow fruit: \frac{1}{16}+ \frac{2}{16} =\frac{3}{16}


Green stem, Yellow fruit: \frac{1}{16}

6 0
3 years ago
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