Question

In the absence of linkage, what is the ratio of phenotypes we expect to see in the progeny of 2 F1 plants or animals that are heterozygous at two loci? A. 1:1:1:1 B. 9:4:1 C. 9:3:3:1 D. We cannot tell without knowing the distance between the loci E. None of the above are correct 2. With linkage, what is the ratio of phenotypes we expect to see in the progeny of 2 F1 plants or animals that are heterozygous at two loci? A. 1:1:1:1 B. 9:4:1 C. 9:3:3:1 D. We cannot tell without knowing the distance between the loci E. None of the above are correct 3. What is the ratio that describes the frequency with which we would see a specific allelic combination in a gamete in the absence of linkage? A. 1:1:1:1 B. 9:4:1 C. 9:3:3:1 D. We cannot tell without knowing the distance between the loci E. None of the above are correct 4. What if the loci were linked? A. 1:1:1:1 B. 9:4:1 C. 9:3:3:1 D. We cannot tell without knowing the distance between the loci E. None of the above are correct 10. If two loci (A and B) exhibit complete linkage, what gametes would be produced from a heterozygote F1 plant or animal that was produced from plants or animals in the P generation that were true-breeding for either all dominant alleles or all recessive alleles? A. AB or ab only B. aB or Ab only C. AB, ab, aB, and Ab at equal frequency D. AB and ab at higher frequency than aB and Ab E. Ab and aB at higher frequency than AB and ab 10.1 What about if the loci were 5cM apart? A. AB or ab only B. aB or Ab only C. AB, ab, aB, and Ab at equal frequency D. AB and ab at higher frequency than aB and Ab E. Ab and aB at higher frequency than AB and ab 10.2 What is the allelic arrangement A. AB or ab only B. aB or Ab only C. AB, ab, aB, and Ab at equal frequency D. AB and ab at higher frequency than aB and Ab E. Ab and aB at higher frequency than AB and ab 14. You are studying 2 loci, one for purple spots (which is dominant to no spots) on leaves and one for white flowers (which is dominant to yellow). In the progeny of an F1 individual you testcrossed, you see that 42 are purple spotted with white flowers and 40 have no spots and yellow flowers. Eight have white flowers and no spots, and 10 have purple spots and yellow flowers. Answer the following questions about these two loci? Are the loci linked? A. They are linked B. They are unlinked C. There is not enough information to determine 14.1 What is the allelic arrangement? A. Coupling B. Repulsion C. Not enough information to determine 14.2 How far apart are they from each other? A. 0cM (completely linked) B. 9cM C. 18cM D. Can't determine the distance because they're linked 14.3 Are they on the same chromosome? A. Yes, they are on the same chromosome because otherwise they wouldn't be linked B. No, they are linked, but not on the same chromosome C. Yes, they are unlinked, but on the same chromosome D. No, they are unlinked and on different chromosomes E. There isn't enough information 17. Which of the following is true about copy number variants A. They are rarely benign B. They are rare C. Individuals may have differences in copy number, but their phenotypes are always the same D. They are most often interspersed duplications E. None of the above 21. Match the genotype on the left to the information that could be determined about these loci on the right. Some answers might be used more than once or not at all. Aa/Bb A/a B/b C/C ABC/abc ab/ab AaBb A. All loci are on different chromosomes B. This answer is not valid C. All loci are on the same chromosome D. Not enough information 29. Two chromosomes have the following segments, where ● represents the centromere. K L M ● N O P Q R S T U V ● W X Y Z What type of chromosome mutation would result in the following chromosomes? K L M ● N O P Q R Y Z S T U V ● W X A. Deletion B. Nonreciprocal translocation C. Reciprocal translocation D. Pericentric inversion E. Paracentric inversion 33. You are mapping 3 genes in drosophila: red (wild-type) vs purple eyes, vestigial wings vs normal (wild-type) wings, and spineless vs bristles (wild-type). You perform a testcross with a completely heterozygous F1 individual and note the following progeny: Phenotype and number wild type-552 purple, vestigial and spineless-541 red, vestigial and spineless-22 purple, normal, and bristles-17 red, vestigial, and bristles-182 purple, normal, and spineless-195 purple, vestigial, and bristles- 235 red, normal, and spineless-241 Answer the following questions about these loci: 33.1 Which locus is in the middle? 33.2 What is the map order? 33.3 What is the map distance between eye color and wing type? 33.4 What is the map distance between spineless and wing type?

Name: 1 in the absence of linkage what is the ratio of phenotypes we expect to see in the progeny of 2 f1 plants or animals that are heterozygous at two loci a 1111 b 941 c 9331 d we cannot tell w 11602
Uploaded: 2023-02-21T17:50:19-08:00
Duration: 5 min 42 s
Channel: Katlin Koehn
Description: 1 in the absence of linkage what is the ratio of phenotypes we expect to see in the progeny of 2 f1 plants or animals that are heterozygous at two loci a 1111 b 941 c 9331 d we cannot tell w 11602

2. With linkage, what is the ratio of phenotypes we expect to see in the progeny of 2 F1 plants or animals that are heterozygous at two loci?
A. 1:1:1:1 B. 9:4:1
C. 9:3:3:1
D. We cannot tell without knowing the distance between the loci
E. None of the above are correct

3. What is the ratio that describes the frequency with which we would see a specific allelic combination in a gamete in the absence of linkage?
A. 1:1:1:1 B. 9:4:1
C. 9:3:3:1
D. We cannot tell without knowing the distance between the loci
E. None of the above are correct

4. What if the loci were linked?
A. 1:1:1:1 B. 9:4:1
C. 9:3:3:1
D. We cannot tell without knowing the distance between the loci
E. None of the above are correct

10. If two loci (A and B) exhibit complete linkage, what gametes would be produced from a heterozygote F1 plant or animal that was produced from plants or animals in the P generation that were true-breeding for either all dominant alleles or all recessive alleles?
A. AB or ab only B. aB or Ab only
C. AB, ab, aB, and Ab at equal frequency
D. AB and ab at higher frequency than aB and Ab
E. Ab and aB at higher frequency than AB and ab

10.1 What about if the loci were 5cM apart?
A. AB or ab only B. aB or Ab only
C. AB, ab, aB, and Ab at equal frequency
D. AB and ab at higher frequency than aB and Ab
E. Ab and aB at higher frequency than AB and ab

10.2 What is the allelic arrangement
A. AB or ab only B. aB or Ab only
C. AB, ab, aB, and Ab at equal frequency
D. AB and ab at higher frequency than aB and Ab
E. Ab and aB at higher frequency than AB and ab

14. You are studying 2 loci, one for purple spots (which is dominant to no spots) on leaves and one for white flowers (which is dominant to yellow). In the progeny of an F1 individual you testcrossed, you see that 42 are purple spotted with white flowers and 40 have no spots and yellow flowers. Eight have white flowers and no spots, and 10 have purple spots and yellow flowers. Answer the following questions about these two loci?
Are the loci linked?
A. They are linked B. They are unlinked
C. There is not enough information to determine

14.1 What is the allelic arrangement?
A. Coupling
B. Repulsion
C. Not enough information to determine

14.2 How far apart are they from each other?
A. 0cM (completely linked)
B. 9cM
C. 18cM
D. Can't determine the distance because they're linked

14.3 Are they on the same chromosome?
A. Yes, they are on the same chromosome because otherwise they wouldn't be linked
B. No, they are linked, but not on the same chromosome
C. Yes, they are unlinked, but on the same chromosome
D. No, they are unlinked and on different chromosomes
E. There isn't enough information

17. Which of the following is true about copy number variants
A. They are rarely benign B. They are rare
C. Individuals may have differences in copy number, but their phenotypes are always the same
D. They are most often interspersed duplications
E. None of the above

21. Match the genotype on the left to the information that could be determined about these loci on the right. Some answers might be used more than once or not at all.
Aa/Bb A/a B/b C/C
ABC/abc
ab/ab
AaBb
A. All loci are on different chromosomes
B. This answer is not valid
C. All loci are on the same chromosome
D. Not enough information

29. Two chromosomes have the following segments, where ● represents the centromere.
K L M ● N O P Q R
S T U V ● W X Y Z
What type of chromosome mutation would result in the following chromosomes?
K L M ● N O P Q R Y Z
S T U V ● W X
A. Deletion
B. Nonreciprocal translocation
C. Reciprocal translocation
D. Pericentric inversion
E. Paracentric inversion

33. You are mapping 3 genes in drosophila: red (wild-type) vs purple eyes, vestigial wings vs normal (wild-type) wings, and spineless vs bristles (wild-type). You perform a testcross with a completely heterozygous F1 individual and note the following progeny:
Phenotype and number
wild type-552
purple, vestigial and spineless-541
red, vestigial and spineless-22
purple, normal, and bristles-17
red, vestigial, and bristles-182
purple, normal, and spineless-195
purple, vestigial, and bristles- 235
red, normal, and spineless-241
Answer the following questions about these loci:
33.1 Which locus is in the middle?
33.2 What is the map order?
33.3 What is the map distance between eye color and wing type?
33.4 What is the map distance between spineless and wing type?

Added by Matthew P.

Biology for AP Courses

Julianne Zedalis, John Eggebrecht

Instant Answer

Solved by Expert Katlin Koehn

02/21/2023

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Step 1: In the absence of linkage, when crossing two F1 plants or animals that are heterozygous at two loci, the ratio of phenotypes we expect to see in the progeny is 9:3:3:1. Show more…

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In the absence of linkage, what is the ratio of phenotypes we expect to see in the progeny of 2 F1 plants or animals that are heterozygous at two loci? A. 1:1:1:1 B. 9:4:1 C. 9:3:3:1 D. We cannot tell without knowing the distance between the loci E. None of the above are correct 2. With linkage, what is the ratio of phenotypes we expect to see in the progeny of 2 F1 plants or animals that are heterozygous at two loci? A. 1:1:1:1 B. 9:4:1 C. 9:3:3:1 D. We cannot tell without knowing the distance between the loci E. None of the above are correct 3. What is the ratio that describes the frequency with which we would see a specific allelic combination in a gamete in the absence of linkage? A. 1:1:1:1 B. 9:4:1 C. 9:3:3:1 D. We cannot tell without knowing the distance between the loci E. None of the above are correct 4. What if the loci were linked? A. 1:1:1:1 B. 9:4:1 C. 9:3:3:1 D. We cannot tell without knowing the distance between the loci E. None of the above are correct 10. If two loci (A and B) exhibit complete linkage, what gametes would be produced from a heterozygote F1 plant or animal that was produced from plants or animals in the P generation that were true-breeding for either all dominant alleles or all recessive alleles? A. AB or ab only B. aB or Ab only C. AB, ab, aB, and Ab at equal frequency D. AB and ab at higher frequency than aB and Ab E. Ab and aB at higher frequency than AB and ab 10.1 What about if the loci were 5cM apart? A. AB or ab only B. aB or Ab only C. AB, ab, aB, and Ab at equal frequency D. AB and ab at higher frequency than aB and Ab E. Ab and aB at higher frequency than AB and ab 10.2 What is the allelic arrangement A. AB or ab only B. aB or Ab only C. AB, ab, aB, and Ab at equal frequency D. AB and ab at higher frequency than aB and Ab E. Ab and aB at higher frequency than AB and ab 14. You are studying 2 loci, one for purple spots (which is dominant to no spots) on leaves and one for white flowers (which is dominant to yellow). In the progeny of an F1 individual you testcrossed, you see that 42 are purple spotted with white flowers and 40 have no spots and yellow flowers. Eight have white flowers and no spots, and 10 have purple spots and yellow flowers. Answer the following questions about these two loci? Are the loci linked? A. They are linked B. They are unlinked C. There is not enough information to determine 14.1 What is the allelic arrangement? A. Coupling B. Repulsion C. Not enough information to determine 14.2 How far apart are they from each other? A. 0cM (completely linked) B. 9cM C. 18cM D. Can't determine the distance because they're linked 14.3 Are they on the same chromosome? A. Yes, they are on the same chromosome because otherwise they wouldn't be linked B. No, they are linked, but not on the same chromosome C. Yes, they are unlinked, but on the same chromosome D. No, they are unlinked and on different chromosomes E. There isn't enough information 17. Which of the following is true about copy number variants A. They are rarely benign B. They are rare C. Individuals may have differences in copy number, but their phenotypes are always the same D. They are most often interspersed duplications E. None of the above 21. Match the genotype on the left to the information that could be determined about these loci on the right. Some answers might be used more than once or not at all. Aa/Bb A/a B/b C/C ABC/abc ab/ab AaBb A. All loci are on different chromosomes B. This answer is not valid C. All loci are on the same chromosome D. Not enough information 29. Two chromosomes have the following segments, where ● represents the centromere. K L M ● N O P Q R S T U V ● W X Y Z What type of chromosome mutation would result in the following chromosomes? K L M ● N O P Q R Y Z S T U V ● W X A. Deletion B. Nonreciprocal translocation C. Reciprocal translocation D. Pericentric inversion E. Paracentric inversion 33. You are mapping 3 genes in drosophila: red (wild-type) vs purple eyes, vestigial wings vs normal (wild-type) wings, and spineless vs bristles (wild-type). You perform a testcross with a completely heterozygous F1 individual and note the following progeny: Phenotype and number wild type-552 purple, vestigial and spineless-541 red, vestigial and spineless-22 purple, normal, and bristles-17 red, vestigial, and bristles-182 purple, normal, and spineless-195 purple, vestigial, and bristles- 235 red, normal, and spineless-241 Answer the following questions about these loci: 33.1 Which locus is in the middle? 33.2 What is the map order? 33.3 What is the map distance between eye color and wing type? 33.4 What is the map distance between spineless and wing type?