Question

In apples, red skin colour ‘R’ is dominant to yellowish-green skin colour ‘r’, and stems with...

In apples, red skin colour ‘R’ is dominant to yellowish-green skin colour ‘r’, and stems with no leaves ‘S’ are dominant over stems with leaves ‘s’. The mating of two apple varieties yielded the following progeny: 380 no leaf stem, red apples; 371 no leaf stem, yellow apples; 131 leaf stem, red apples; and 100 leaf stem, yellow apples. What were the genotypes of the parents in this cross?
Science   Biology   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

Here phenotypic ratio of progeny is 380: 371: 131: 100 = 3.8: 3.7: 1.3: 1. This phenotypic ratio is very closer to 3: 3: 1: 1. This 3: 3: 1: 1 phenotypic ratio in the progeny suggests two genes, one heterozygous in each parent and one heterozygous in one parent and homozygous recessive in the other. Therefore the genotypic ratio of parents will be either RrSs X Rrss or RrSs X rrSs. But first one does not satisfy the obtained phenotypic ratio. Thus, the answer will be RrSs X rrSs.

0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
In an ornamental plant, silver-colored flowers (s) are recessive to blue-colored flowers (S), red leaves (r)...
In an ornamental plant, silver-colored flowers (s) are recessive to blue-colored flowers (S), red leaves (r) are recessive to green leaves (R), and long stems (l) are recessive to short stems (L). All three genes involved are located on the same chromosome. Two true-breeding strains were crossed to produce an F1 plant. Then, this F1 plant was test-crossed to a plant with silver flowers, red leaves, and long stems, to produce the following progeny: progeny phenotype count of progeny silver...
n corn, red kernel color (R) is dominant to yellow (r) and smooth kernel texture (W)...
n corn, red kernel color (R) is dominant to yellow (r) and smooth kernel texture (W) is dominant to wrinkled (w). Corn heterozygous for kernel color and kernel texture are fertilized with corn that is yellow and wrinkled resulting in the following offspring. 56 red smooth 40 red wrinkled 45 yellow smooth 34 yellow wrinkled What is the null hypothesis? What are the genotypes of the parents? Perform a Chi-Square analysis and determine if the observed offspring numbers conform to...
Cross 1 Progeny: 38 two-lobed, red 18 two-lobed, yellow 38 multilobed, red 18 multilobed, yellow Cross...
Cross 1 Progeny: 38 two-lobed, red 18 two-lobed, yellow 38 multilobed, red 18 multilobed, yellow Cross 2 Progeny: 14 two-lobed, red 14 two-lobed, yellow 14 multilobed, red 14 multilobed, yellow In tomato plants, the production of red fruit color is under the control of an allele R. Yellow tomatoes are rr. The dominant phenotype for fruit shape is under the control of an allele T, which produces two lobes. Multilobed fruit, the recessive phenotype, have the genotype tt. Two different...
Tallness (T ) in snapdragons is dominant to dwarfism (t ), while red (R ) flower...
Tallness (T ) in snapdragons is dominant to dwarfism (t ), while red (R ) flower color is incompletely dominant to white (R' ). The heterozygous condition results in pink (RR' ) flower color. The genes for these traits occur on separate chromosomes. A dwarf, red snapdragon is crossed with a plant homozygous for tallness and white fowers. a) Determine the genotypes of the parents. b) Determine all the types of gametes each parent can produce. c) Complete the Punnett...
1. In humans, red/green color blindness is sex-linked.  The gene for normal vision (N) is dominant to...
1. In humans, red/green color blindness is sex-linked.  The gene for normal vision (N) is dominant to its recessive allele for color blindness (n). A normal vision woman marries a man with red/green color blindness. Both of their fathers are color blind. What % of their sons would have normal vision? A. 50% B. 75% C. 100% D. 0% 2. The alleles for ABO blood types are designated by IA, IB & i  (also written Io). A woman with type B blood...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT