Chromosome Pgeneration s's c'c* ss C gamete formation gamete formation wi ld %3D s*c* SC fertilization HestenoS F, generation s's c'c backcross the F, flies with recessive parent s'sc'c Ss cc gamete formation gamete formation s*c SC s'c Sc* SC fertilization F, generation s's ctc s's c ss ctc SS C 1 wild-type : 1 scarlet, curled : 1 curled phenotypic ratio 1 scarlet Figure 3.4: If the scarlet gene and curled gene are on separate chromosomes, they assort independently.

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An organism that has multiple copies of its fourth chromosome is best considered O trisomic O aneuploidic O tetraploidic O polyploidic O mosaic

search Animal humans birds both gametes neither gamete male gamete female gamete 10 O * 12 Female XX ZW 45 13 * 14 15 *REQUIRED 3. In humans, it is the male gamete that is responsible for determining the sex of the offspring. Identify which type of gamete determines the sex of the offspring in birds. Sex Chromosomes in Animals 16 Male XY ZZ 17 18 19 * 20 21 A 0 22 *REQUIRED P 6 0 23 * W 1

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?

S chahpant &yele checkpoints. *sler chrama hids vs chromag nid URITesis (and cleavage furrow prorse Cheta point M phase (mitosis) Chedfont2 o-never Sunde ogan G2 phase (Gap 2) G1 phase (Gap1) u ses chrome20ves Thecell ycle ntendhase is nat n meitosis, ts or. J0 Sphase (DNA synthesis) GO phase (end of cell cycling) nLero 2. Refer to the above diagram. What are the main events of each of the phases of the cell cycle as seen above? Phase Main Events G1 G2 GO

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Brightspace a Reproduction and Genetic Variation Unit Test rina Gill: Attempt 2 → X ge 1: 3 2 ✓ 5 ✓ 80 3 6 9 11 12 14 15 X i E MEIOSIS Meiotic Division1 Meiotic Division 2 D R LL %5 O 9) A R T U 8 B & > } 1000 Y DNA Replication and Recombination I C Cell Division 1 D Cell Division 2 J up NM K

Choose one option pls there are 4 options

pls answer only item no. 12. thaank uu!!