Question

In: Biology

In peas, tall (T) is dominant to short (t), yellow (Y) is dominant to green (y)...

In peas, tall (T) is dominant to short (t), yellow (Y) is dominant to green (y) and round (R) is dominant to wrinkled (r). A purebreeding plant with tall, green and wrinkled pea phenotypes is crossed to a purebreeding plant that is short and makes yellow, round peas. When peas from this F1 generation are crossed, what is the probability of obtaining a short plant that makes yellow, wrinkled peas in the F2?

Solutions

Expert Solution

Pure breeding plant is one that is homozygous for the allele.

Genotype of a purebreeding plant with tall, green and wrinkled pea phenotypes is

TTyyrr

Genotype of a purebreeding plant with short and makes yellow, round peas phenotypes is

ttYYRR

F1 cross of a TTyyrr X ttYYRR cross will give TtYyRr offspring.

Since it’s a trihybrid cross (TtYyRr X TtYyRr) is difficult to show in a Punnet square (64 boxes), we use th forked-line method to calculate the probability

Each monohybrid cross give 3: 1 phenotypic ratio

The genetic probabilities are determined by multiplying together the probabilities of each phenotype.

Tall/Dwarf                   Round or Wrinkled Yellow or green Observed product Phenotype

¾ tall                              ¾ round ¾ yellow (3/4) * (3/4)*(3/4) 27/64 tall, round, yellow

¼ green (3/4) * (3/4)*(1/4) 9/64 tall, round, green

                                        ¼ Wrinkled ¾ yellow (3/4) * (1/4)*(3/4) 9/64 tall, wrinkled, yellow

¼ green (3/4) * (1/4)*(1/4) 3/64 tall, wrinkled , green

¾ short ¾ round ¾ yellow (1/4) * (3/4)*(3/4) 9/64 short, round, yellow

¼ green (1/4) * (3/4)*(1/4) 3/64 short, round, green

                                        ¼ Wrinkled             ¾ yellow (1/4)*(1/4)*(3/4) 3/64 short, wrinkled, yellow

¼ green (1/4) * (1/4)*(1/4) 1/64 short, wrinkled, green

Probability of obtaining short plant that makes yellow, wrinkled peas in the F2 (short, wrinkled green) is 3/64.

  

gladiator answered 1 year ago
Next > < Previous

Related Solutions

16. In peas, tall plants (T) are dominant to short (t) and purple (P) is dominant...
16. In peas, tall plants (T) are dominant to short (t) and purple (P) is dominant to white flower color (p). What are the phenotypes of cross between ttPp and TtPP?
Tall is dominant over short, green seeds is dominant over yellow seeds. Give the result (...
Tall is dominant over short, green seeds is dominant over yellow seeds. Give the result ( GENOTYPES AND PHENOTYPES) from the cross below. p- Homozygous Tall /Green x Homozygous Short/Yellow F1- ? F2- ? **Any monohybrid cross results in A 3:1 Ratio **Any dihybrid cross results in A 9:3:3:1 Ratio
In peas, yellow seed pod (Y) is dominant to green seed pod (y), and inflated seed...
In peas, yellow seed pod (Y) is dominant to green seed pod (y), and inflated seed pod (N) is dominant to constricted seed pod (n). These two loci are NOT linked. A true-breeding pea plant with yellow, inflated pods is crossed to a true-breeding plant with green, constricted pods. The F1 progeny are self-fertilized. What is the probability of obtaining a plant that produces yellow, constricted seed pods in the F2?
In garden peas, tall plants are dominant to short plants and smooth seeds are dominant over...
In garden peas, tall plants are dominant to short plants and smooth seeds are dominant over wrinkled seeds. If two heterozygous tall plants with smooth seeds (TtRr) are crossed, what are the potential genotypes and phenotypes that can be expected in the offspring? What is the genotype of the parents? What are the gametes for each parent? What is the phenotypic ratio? What proportion of the Tall plants with smooth seeds is heterozygous for both traits?
In pea plants, tall (T) is dominant over short (t). What are the genotypes and phenotypes...
In pea plants, tall (T) is dominant over short (t). What are the genotypes and phenotypes of the offspring of a cross between a TT and a tt plant? Genotype____________               Phenotype___________
Here are the phenotypes for the following genotypes (capital letters are dominant): T tall, t short,...
Here are the phenotypes for the following genotypes (capital letters are dominant): T tall, t short, S smooth kernel, s wrinkled kernel, R purple kernel, r yellow kernel. The resulting F1s are test-crossed and you get the following results: Use an extra page or the back if you need more space- just make sure to scan and send me all work) tall smooth purple 65 tall smooth yellow 12 tall wrinkled purple 451 tall wrinkled yellow 123 short smooth purple...
1. Tall (T), Purple (P), and Round (R) are dominant to Short (t), White (p), and...
1. Tall (T), Purple (P), and Round (R) are dominant to Short (t), White (p), and Wrinkled (r). The following pea plants were crossed (TtPpRr X ttpprr) and produced the offspring below: Phenotypes of offspring Number of offspring Tall White Wrinkled 7 Short White Wrinkled 48 Tall White Round 98 Tall Purple Wrinkled 29 Tall Purple Round 42 Short Purple Wrinkled 102 Short Purple Round 13 Short White Round 31 a. Determine the arrangement of alleles on the homologous chromosomes...
2. Cross a homozygous tall yellow seeded plant with a homozygous short green seeded plant. This...
2. Cross a homozygous tall yellow seeded plant with a homozygous short green seeded plant. This is called the P1 cross, and it will produce offspring called the F1 generation. Tallness is dominant to shortness, so use a capital T to represent the tallness allele and lower case t to represent the shortness allele. Yellow seeds are dominant to green sees, so use a capital Y to represent the yellow seed allele and a lower case y to represent the...
2. Cross a homozygous tall yellow seeded plant with a homozygous short green seeded plant. This...
2. Cross a homozygous tall yellow seeded plant with a homozygous short green seeded plant. This is called the P1 cross, and it will produce offspring called the F1 generation. Tallness is dominant to shortness, so use a capital T to represent the tallness allele and lower case t to represent the shortness allele. Yellow seeds are dominant to green sees, so use a capital Y to represent the yellow seed allele and a lower case y to represent the...
In garden pea plants, tall stem length (T) is dominant over short stem length (t). In...
In garden pea plants, tall stem length (T) is dominant over short stem length (t). In an ideal garden pea plant population exhibiting Hardy–Weinberg equilibrium, if allele T has a frequency of 0.88, what percentage of the population is recessive for this trait? Round your answer to the nearest whole number. -------- There is a lack of dominance in black (B) and white (W) horse coat colours. An offspring produced from a black horse and a white horse has a...
ADVERTISEMENT
Subjects
ADVERTISEMENT
Latest Questions
ADVERTISEMENT