All categories

3 years ago

Russia’s population density

1 answer:

8 0

Russia's population density is 8.4 people per square kilometre (22 per square mile), making it one of the most sparsely populated countries in the world.

You might be interested in

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

A quick automatic response to something in the environment is called

garri49 [273]

A reflex, an action that is performed as a response to a stimulus and without conscious thought.

3 0

3 years ago

Sclerenchyma cells: A. have unevenly thickened cell walls. B. have thin primary cell walls. C. make up the bulk of most plant ti

GenaCL600 [577]

Answer: A and D

Explanation: Sclerenchyma cells are thick cells that provide support in plants. They have thick cell walls lined with lignin. They possess extremely thick cell walls which gives rigidity and support to the plant body. Their main and primary function is to give support and structure to the plant.

Sclerenchyma cells don't have protoplast that mean the cells are dead at maturity.

5 0

3 years ago

How do amounts of green pigment,chlorophyll, different from summer to fall

ohaa [14]

In summer, the amount of green pigment and chlorophyll are much more, in fall, the amount of chlorophyll and green pigment is less. That's the reason the leaves turn colors.

7 0

3 years ago

Read 2 more answers

If the entire mRNA sequence for a polypeptide was AUGUACUCGCGACCGUAA, how many amino acids does the polypeptide have

DaniilM [7]

Answer:

5 amino acids

Explanation:

The process of translation involves synthesizing a sequence of amino acids from a mRNA template. The mRNA molecule is read in a group of three nucleotides called CODONS. A codon specifies or codes for an amino acid.

In the question, a mRNA sequence was given as follows: AUGUACUCGCGACCGUAA. From this sequence comprising of 6 codons, 5 possible amino acids will be contained in the polypeptide encoded by this mRNA molecule as the last codon (UAA) is a STOP codon. The following are the codons in the mRNA sequence and their respective amino acids:

*AUG- methionine (met)

*UAC - tyrosine (Tyr)

*UCG - Serine (Ser)

*CGA - Arginine (Arg)

*CCG - Proline (Pro)

*UAA - Stop

8 0

2 years ago