emale Parent: Wild ale Parent: Wild ristles haven inged pineless ristles F M Total ial 1: 417 Flies (501 · 917) emale Parent: Fly 12 (Wild) ale Parent: Fly 9 (Wild) haven inged pineless 74 92 166 75 62 137 95 102 197 F M Total 106 83 189 106 122 228 0 0 0 ial 2: 435 Flies (918 1352) Singed Shaven
emale Parent: Wild ale Parent: Wild ristles haven inged pineless ristles F M Total ial 1: 417 Flies (501 · 917) emale Parent: Fly 12 (Wild) ale Parent: Fly 9 (Wild) haven inged pineless 74 92 166 75 62 137 95 102 197 F M Total 106 83 189 106 122 228 0 0 0 ial 2: 435 Flies (918 1352) Singed Shaven
Biology: The Unity and Diversity of Life (MindTap Course List)
15th Edition
ISBN:9781337408332
Author:Cecie Starr, Ralph Taggart, Christine Evers, Lisa Starr
Publisher:Cecie Starr, Ralph Taggart, Christine Evers, Lisa Starr
Chapter44: Population Ecology
Section: Chapter Questions
Problem 14SQ
Related questions
Question
Background Information:
Autosomal Dominant/Recessive
- The trait is encoded by a single genetic locus with two segregating alleles: One dominant (A) and one recessive (a). The locus is not on a sex chromosome, and is not linked to any other trait unless specified.
Autosomal Codominance
- This mode is the same as Autosomal Dominant/Recessive, except that neither allele is
dominant or recessive and heterozygous individuals have a distinct phenotype.
- The trait is encoded by a single genetic locus with two segregating alleles: One dominant (A) and one recessive (a). The locus is not on a sex chromosome, and is not linked to any other trait unless specified.
Autosomal Codominance
- This mode is the same as Autosomal Dominant/Recessive, except that neither allele is
dominant or recessive and heterozygous individuals have a distinct phenotype.
X-linked Dominant/Recessive
- The trait is encoded by a single genetic locus with two segregating alleles: One dominant (A) and one recessive (a). The locus is located on the X-chromosome, and is not linked to any other trait unless specified.
X-linked Codominance
- This is the same as X-linked dominant/recessive, except that heterozygous females (two
copies of the X-chromosome) experience a distinct phenotype relative to females that are homozygous for either of the two alleles. Males will be segregating with twophenotypes (because they only have one X-chromosome), and females will be segregating with three phenotypes.
Autosomal Dominant/Recessive (AA lethal)
- This mode is the same as Autosomal Dominant/Recessive, except that individuals that are homozygous for the dominant allele are embryo-lethal. Since they are embryo-lethal, they are not observed. This causes the ratio of progeny to be skewed, and it also makes it impossible to establish a true-breeding line with the dominant allele.
X-linked Codominance
- This is the same as X-linked dominant/recessive, except that heterozygous females (two
copies of the X-chromosome) experience a distinct phenotype relative to females that are homozygous for either of the two alleles. Males will be segregating with two
Autosomal Dominant/Recessive (AA lethal)
- This mode is the same as Autosomal Dominant/Recessive, except that individuals that are homozygous for the dominant allele are embryo-lethal. Since they are embryo-lethal, they are not observed. This causes the ratio of progeny to be skewed, and it also makes it impossible to establish a true-breeding line with the dominant allele.
What to do
- Determine how many genes are responsible for the segregating traits?
- How they are inherited?
- Whether they are linked, and if they are linked, what are the map distances?
Crosses - Population Summary
- Images Attached!
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