ZuoTi.Pro
Question

In a cross involving independently assorting loci, the cross BBYY x bbyy (assume "B" and "Y"...

In a cross involving independently assorting loci, the cross BBYY x bbyy (assume "B" and "Y" are dominant to "b" and "y," respectively) will yield all dihybrid offspring. When those offpspring are crossed, the result is usually a 9:3:3:1 phenotypic ratio.

But what if the locus "B" and "Y" did not sort independently (i.e., they were linked, at least partially)? It would mean "BY" and "by" are now more likely. How would this specifically affect the expected 9:3:3:1 ratio? To be more clear, which one of these numbers in the ratio (9, 3, 3, and/or 1) would be expected to decrease?

  • A. the 9 would decrease

  • B. one of the 3's would decrease

  • C. the 1 would decrease

  • D. both 3's would decrease

science   biology   
0 0
Add a comment Improve this question Transcribed image text
Next > < Previous
Sort answers by oldest

Homework Answers

Answer #1

BL bu 881126 Bb OD

0 0
Add a comment
Know the answer?
Add Answer to:
In a cross involving independently assorting loci, the cross BBYY x bbyy (assume "B" and "Y"...
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. Our experts will answer your question WITHIN MINUTES for Free.
Similar Homework Help Questions

  • In a cross involving independently assorting loci, the cross BBYY x bbyy (assume "B" and "Y"...

    In a cross involving independently assorting loci, the cross BBYY x bbyy (assume "B" and "Y" are dominant to "b" and "y," respectively) will yield all dihybrid offspring. When those offpspring are crossed, the result is usually a 9:3:3:1 phenotypic ratio. But what if the locus "B" and "Y" did not sort independently (i.e., they were linked, at least partially)? It would mean "BY" and "by" are now more likely. How would this specifically affect the expected 9:3:3:1 ratio? To...

  • In the cross AaBbCcDdEe X AaBbCcDdEe, assume that all loci are assorting independently and that uppercase...

    In the cross AaBbCcDdEe X AaBbCcDdEe, assume that all loci are assorting independently and that uppercase letters symbolize alleles that are completely dominant to alleles symbolized by lowercase letters. What is the expected frequency of obtaining the phenotype ABCde (i.e. genotype A B_C_ddee)? A. (1/4) B. [(1/2)']+1(1/4) C. [(1/2)'(1/4)] D. [(3/4))+1(1/4) E. [(3/4)1[(1/4)] 마인무오ㅇ무오무오오마우무오모 모오오모모오오 "오모오모 In the cross AaBbCcDdEe X AaBbCcDdEe, assume that all loci are assorting independently and that uppercase letters symbolize alleles that are completely dominant to...

  • 44. In Nicotiana tabacum, there are two independently-assorting gene loci that influence the appearance of the yellow b...

    44. In Nicotiana tabacum, there are two independently-assorting gene loci that influence the appearance of the yellow burley character, i.e. A and B. When both loci are homozygous for their recessive alleles, i.e. aabb, the plant is yellow. When a dominant allele, i.e. A or B, is present at either locus, the plant is green. (a) If a cross were made between a homozygous green strain monosomic for one of these chromosomes (ABB) and a disomic yellow strain (aabb), what...

  • Two independently assorting genes help determine fruit color in squash. At the first locus, the W...

    Two independently assorting genes help determine fruit color in squash. At the first locus, the W allele codes for a dominant white phenotype, whereas the w allele allows colored squash. At the second locus, the allele Y codes for a dominant yellow phenotype, and the allele y codes for a recessive green phenotype. The interaction between these two genes is an example of dominant epistasis, with the W locus acting as the epistatic locus and the Y locus acting as...

  • Which of the following is true regarding dihybrid crosses? A. Each parent involved in the cross...

    Which of the following is true regarding dihybrid crosses? A. Each parent involved in the cross is heterozygous for at least one of the two genes being assessed. B. Two gene loci are assessed and the parents can be any genotype at these two loci. C. There are 9 different fertilization possibilities. D. The ratio 9:3:3:1 means that of the possible outcomes in offspring; 9/16 will express the dominant phenotype for both loci, 3/16 will express the dominant phenotype for...

  • The cross of CcDd ⋅ CcDd results in a 12:3:1 phenotypic ratio. What are the expected...

    The cross of CcDd ⋅ CcDd results in a 12:3:1 phenotypic ratio. What are the expected phenotypic ratios when a CcDd ⋅ ccdd testcross is made involving the same two genes? (They are assorting independently.)

  • Two plants in a cross were each heterozygous for two gene pairs (Ab/aB) whose loci are...

    Two plants in a cross were each heterozygous for two gene pairs (Ab/aB) whose loci are linked and 25 mu apart. Assuming that crossing over occurs during the formation of both male and female gametes and that the A and B alleles are dominant, determine the phenotypic ratio of their offspring. Please Explain your reasoning behind your answers and how you got to them. Thanks!

  • Practice Genetics Problems SHOW ALL WORK IN THE SPACES BELOW EACH QUESTION. Monohybrid cross: Sex linkage...

    Practice Genetics Problems SHOW ALL WORK IN THE SPACES BELOW EACH QUESTION. Monohybrid cross: Sex linkage 1. In fruit flies, eye color is sex linked. Red color is dominant to white. a) A red eyed male was crossed with a white eyed female. What are the expected phenotypic frequencies of the offspring with respect to gender and eye color? b) A white eyed male was crossed with a homozygous red eyed female; an F, female was then crossed with a...

  • Question 12 only. Punnett's square analysis for the parental cross r Rr Rr 9) If we...

    Question 12 only. Punnett's square analysis for the parental cross r Rr Rr 9) If we used the above offspring (F1) in a new cross, what would be the genotypes and phenotypes of the offspring of the Fz generation? 10) What is the genotypic ratio of the F2 generation? 11) What is the phenotypic ratio of the F2 generation? 12) What would be the genotypic and phenotypic ratios of offspring from a cross between a homozygous recessive parent (r r)...

  • Please provide details: White fruit color in summer squash is governed by a dominant gene (W)...

    Please provide details: White fruit color in summer squash is governed by a dominant gene (W) and colored fruit by its recessive allele (w). Yellow fruit is governed by an independently assorting hypostatic gene (Y) and green by its recessive allele (y). When dihybrid plants are crossed, the offspring appear in the ratio of 12 white : 3 yellow : 1 green. What fruit color ratio is expected from the cross of WwYy to Wwyy? 1/2 white, 1/4 yellow, 1/4...

ADVERTISEMENT
Free Homework Help App
Download From Google Play
Scan Your Homework
to Get Instant Free Answers
Need Online Homework Help?
Ask a Question
Get Answers For Free
Most questions answered within 3 hours.
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT