ou want to map three linked genes in tomato: oblate (o) vs. round (O) fruit; peach (p) vs. smooth (P) skin; and dwarf (d) vs. tall lants. You testcross a triple heterozygous F1plant by crossing it to a homozygous triple recessive (opd/opd) plant. The table nows the numbers of testcross offspring you obtained for each phenotype combination. atch each of the items on the left with the correct response: OTE: The slash (/) separates the set of alleles on the two homologous chromosomes. Phenotype combination round fruit, smooth skin, tall S Number of progeny 70 90

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You want to map three linked genes in tomato: oblate (o) vs. round (O) fruit; peach (p) vs. smooth (P) skin; and dwarf (d) vs. tall (D)
plants. You testcross a triple heterozygous F1plant by crossing it to a homozygous triple recessive (opd/opd) plant. The table
shows the numbers of testcross offspring you obtained for each phenotype combination.
Match each of the items on the left with the correct response:
NOTE: The slash (/) separates the set of alleles on the two homologous chromosomes.
Phenotype combination
round fruit, smooth skin, tall
oblate fruit, peach skin, dwarf
round fruit, smooth skin, dwarf
oblate fruit, peach skin, tall
oblate fruit, smooth skin, tall
round fruit, peach skin, dwarf
round fruit, peach skin, tall
oblate fruit, smooth skin, dwarf
TOTALS
Number of progeny
70
82
21
18
4
1
413
391
1000
Transcribed Image Text:You want to map three linked genes in tomato: oblate (o) vs. round (O) fruit; peach (p) vs. smooth (P) skin; and dwarf (d) vs. tall (D) plants. You testcross a triple heterozygous F1plant by crossing it to a homozygous triple recessive (opd/opd) plant. The table shows the numbers of testcross offspring you obtained for each phenotype combination. Match each of the items on the left with the correct response: NOTE: The slash (/) separates the set of alleles on the two homologous chromosomes. Phenotype combination round fruit, smooth skin, tall oblate fruit, peach skin, dwarf round fruit, smooth skin, dwarf oblate fruit, peach skin, tall oblate fruit, smooth skin, tall round fruit, peach skin, dwarf round fruit, peach skin, tall oblate fruit, smooth skin, dwarf TOTALS Number of progeny 70 82 21 18 4 1 413 391 1000
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Parental phenotype combinations
Double crossover combinations
Gene order on the chromosome
=
|||
|||
=
=
=
|||
=
O-P-D
Oblate smooth tall; and round peach dwarf
gene order O-D-P
Round smooth tall; and oblate peach dwarf
Round peach tall; and oblate smooth dwarf
P-O-D
Round smooth dwarf; and oblate peach tall
Transcribed Image Text:Dragged and dropped options on the right-hand side will be automatically saved. For keyboard navigation... SHOW MORE ✓ Parental phenotype combinations Double crossover combinations Gene order on the chromosome = ||| ||| = = = ||| = O-P-D Oblate smooth tall; and round peach dwarf gene order O-D-P Round smooth tall; and oblate peach dwarf Round peach tall; and oblate smooth dwarf P-O-D Round smooth dwarf; and oblate peach tall
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Introduction

Gene are the basic unit of heredity. A gene exists in 2 alternative forms called allele. When two alleles of a gene are same it is known as homozygous condition and when two allele of a gene are different it is known as heterozygous condition.

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