Biology, 17.01.2021 04:30 kat2177

Two genes are hypothesized to be linked. The map distance between the genes is thought to be 12 map units. Out of 1000 offspring produced by two heterozygous parents, predict how many would occur in each phenotypic category.

Answers: 2

Show answers

Answers

Answer from: jzoda7318

Approximately the number of individuals with each phenotype is:

RS-->0.75 x 1000 = 750rs--> 0.19 x 1000 = 190Rs--> 0.05 x 1000 = 50rS--> 0.05 x 1000 = 50

Explanation:

Available data:

Two genes are hypothesized to be linkedThe map distance between the genes is thought to be 12 map units. Two heterozygous parents1000 offspring produced

Let us say that the two diallelic genes are R (alleles R and r) and S (alleles S and s)

Heterozygous parents might have the following genotype RS / rs

We know that there are 12mp between genes, which means that the recombination frequency equals 0.12 or 12%.

0.12 of the gametes are recombinants and 0.88 are parentals. There are two types of parentals and two types of recombinant, so 0.06 + 0.06 are recombinants while 0.44 + 0.44 are parentals. This is:

Cross:

Parentals) RS/rs x RS/rs

Gametes) RS (parental) 0.44

rs (parental) 0.44

Rs (Recombinant) 0.06

rS (Recombinant) 0.06

Punnet square) RS rs Rs rS

RS RS/RS RS/rs RS/Rs RS/rS

rs RS/rs rs/rs Rs/rs rS/rs

Rs RS/Rs rs/Rs Rs/Rs rS/Rs

rS RS/rS rs/rS Rs/rS rS/rS

F1) Genotypes:

1 RS/RS --> 0.44x 0.44 = 0.1936 2 RS/rs --> 0.44x 0.44 = 0.1936 x2 = 0.38722 RS/Rs --> 0.44 x 0.06 = 0.264 x 2 = 0.0532 RS/rS --> 0.44 x 0.06 = 0.264 x 2 = 0.0531 rs/rs --> 0.44x 0.44 = 0.1936 2 rs/Rs --> 0.44 x 0.06 = 0.264 x 2 = 0.0532 rS/rs --> 0.44 x 0.06 = 0.264 x 2 = 0.0531 rS/rS --> 0.06 x 0.06 = 0.00361 Rs/Rs --> 0.06 x 0.06 = 0.00362 Rs/rS --> 0.06 x 0.06 = 0.0036 x 2 = 0.0072

Phenotypes:

RS-->0.7506 (RS/RS + RS/rs + RS/Rs + RS/rS + Rs/rS)rs--> 0.1936 (rs/rs)Rs--> 0.0566 (rs/Rs + Rs/Rs)rS--> 0.0566 (rS/rS + rS/rs)

Now, to know how many individuals would occur in each phenotypic category, you just need to multiply it by 1000, that is the total number of individuals

RS-->0.75 x 1000 = 750rs--> 0.19 x 1000 = 190Rs--> 0.05 x 1000 = 50rS--> 0.05 x 1000 = 50

Answer from: Quest

the index of refraction of the second medium is higher. i just took the test trust me !

Answer from: Quest

C.25-28.. . .

Another question on Biology

Biology, 22.06.2019 04:30

Why is it incorrect to say that mitochondria function only as energy factories with cell

Answers: 1

Answer

Biology, 22.06.2019 04:30

Emmet didn’t want to weed the garden. he put off the task toward the end of the day. he even tried to get his sister to do the job. what type of goal orientation did emmet display toward weeding the garden?

Answers: 1

Answer

Biology, 22.06.2019 05:30

What is the compliment dna strand to the following sequence: ttgactaggcta

Answers: 1

Answer

Biology, 22.06.2019 07:00

8) animals respond in various ways to stimuli detected through their senses. some of these responses are stimulated by the presence of danger. which of these animal responses is the best example of a response to an immediate threat? a) a rooster crows every morning at the first sign of light. b) as something approaches an octopus, it shoots a cloud of ink. c) from late fall until spring, bears hibernate to preserve energy. d) a dog is getting hot in the sunlight, so he moves to a shaded area.

Answers: 3

Answer

You know the right answer?

Two genes are hypothesized to be linked. The map distance between the genes is thought to be 12 map...

Questions

Biology, 26.03.2021 01:00

Using the Dichotomous Key, Identify the RED organism. a. Alienus Stripicus b. Alienus Tritoothicus c. Alienus Quadiegicus