Species or F1 hybrid Root tip chromosome number The following table presents chromosome data on four species of plants and their F1 hybrids: Meiosis I Metaphase Number of Number of bivalents univalents A 20 10 0 B 20 10 0 C 10 5 0 D 10 5 0 A x B 20 0 20 A x C 15 5 5 AxD 15 5 5 Cx D 10 0 10 Deduce the chromosomal origin of Species A. Show clearly the basis of your answer by analyzing and diagramming the crosses given above. Distinguish between chromosomes and give chromosome number for individuals in the crosses mentioned above. From these crosses, diagram the cross that gave rise to Species A. b. How many bivalents and univalents would you expect to observe at meiotic metaphase I in a hybrid between species C and species B? c. How many bivalents and univalents would you expect to observe at meiotic metaphase I in a hybrid between species D and species B?

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Species or F1
hybrid
Root tip chromosome
number
The following table presents chromosome data on four species of plants and their F1 hybrids:
Meiosis I Metaphase
Number of
Number of
bivalents
univalents
A
20
10
0
B
20
10
0
C
10
5
0
D
10
5
0
A x B
20
0
20
A x C
15
5
5
AxD
15
5
5
Cx D
10
0
10
Deduce the chromosomal origin of Species A. Show clearly the basis of your answer by
analyzing and diagramming the crosses given above. Distinguish between chromosomes and
give chromosome number for individuals in the crosses mentioned above. From these crosses,
diagram the cross that gave rise to Species A.
b. How many bivalents and univalents would you expect to observe at meiotic metaphase I in a
hybrid between species C and species B?
c. How many bivalents and univalents would you expect to observe at meiotic metaphase I in a
hybrid between species D and species B?
Transcribed Image Text:Species or F1 hybrid Root tip chromosome number The following table presents chromosome data on four species of plants and their F1 hybrids: Meiosis I Metaphase Number of Number of bivalents univalents A 20 10 0 B 20 10 0 C 10 5 0 D 10 5 0 A x B 20 0 20 A x C 15 5 5 AxD 15 5 5 Cx D 10 0 10 Deduce the chromosomal origin of Species A. Show clearly the basis of your answer by analyzing and diagramming the crosses given above. Distinguish between chromosomes and give chromosome number for individuals in the crosses mentioned above. From these crosses, diagram the cross that gave rise to Species A. b. How many bivalents and univalents would you expect to observe at meiotic metaphase I in a hybrid between species C and species B? c. How many bivalents and univalents would you expect to observe at meiotic metaphase I in a hybrid between species D and species B?
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