What ethical issue is normally related to therapeutic cloning in which embryonic stem cells are

After its main sequence existence, a medium-sized star, like our Sun, will become a___?

Schach [20]

Red giant or red supergaint (its the same thing)

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What is a molecule ?

Delicious77 [7]

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What is the heart's curculation

Oduvanchick [21]

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2 years ago

The R and S loci are 35 m.u. apart. If a plant of genotype is selfed, what progeny phenotypes will be seen and in what proportio

Veronika [31]

Complete question:

The R and S loci are 35 m.u. apart. If a plant of genotype RS/rs is selfed, what progeny phenotypes will be seen and in what proportions

Answer:

R-/S- = 0.6052
R-/ss = 0.1443
rr/S- = 0.1443
rr/ss = 0.1056

Explanation:

<u>Available data:</u>

R-S are 35 mu apart
Cross: RS/rs x RS/rs

First, we need to recognize the parental gametes and the recombinant ones.

Cross:

Parentals) RS/rs x RS/rs

Gametes) RS Parental ⇒ Equal to the parental genotype

rs Parental ⇒ Equal to the parental genotype

Rs Recombinant ⇒ Product of recombination

rS Recombinant ⇒ Product of recombination

We know that genes are 35 MU apart from each other. The map unit is the distance between the pair of genes for which every 100 meiotic products, one of them results in a recombinant one.

To calculate the recombination frequency, we have to know that 1% of recombinations = 1 map unit = 1cm. And that the maximum recombination frequency is always 50%.

According to this information, if 1 MU = 1% recombination frequency, then

35MU --------- 35% recombination frequency = 0.35

Now, let us calculate the frequency of each gamete type.

35 map units = 35 % of recombination in total

= % Rs + % rS

= 17.5% Rs + 17.5% rS

Now, if the recombination frequency equals 35% then the parental frequency is 100% - 35% = 65%

65 % parental frequency = % of RS + % rs

= 32.5% RS + 32.5% rs

The frequency of each gamete is

RS ⇒ Parental ⇒ 32.5% (65% / 2) = 0.325
rs ⇒ Parental ⇒ 32.5% (65% / 2) = 0.325
Rs ⇒ Recombinant ⇒ 17.5% (35% / 2) = 0.175
rS ⇒ Recombinant ⇒ 17.5% (35% / 2) = 0.175

F1 Genotypes and Proportions

RS/RS = 0.325 x 0.325 = 0.1056
RS/Rs = 2x 0.325 x 0.175 = 0.1137
RS/rS = 2x 0.325 x 0.175 =0.1137
rs/rs = 0.325 x 0.325 = 0.10562
rs/RS = 2x 0.325 x 0.325 = 0.2112
rs/Rs = 2x 0.325 x 0.175 = 0.1137
rs/rS = 2x 0.325 x 0.175 = 0.1137
Rs/rS = 2x 0.175 x 0.175 = 0.061
Rs/Rs = 0.175 x 0.175 = 0.0306
rS/rS = 0.175 x 0.175 = 0.0306

F1 Phenotypes and Proportions

R-/S- = 0.1056 + 0.1137 + 0.1137 + 0.2112 + 0.061 = 0.6052
R-/ss = 0.1137 + 0.0306 = 0.1443
rr/S- = 0.1137 + 0.0306 = 0.1443
rr/ss = 0.1056

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