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13.D. zygotein animal cells meiosis results in gametes which posse.pdf
- 1. 13.D. zygote in animalcells meiosis results in gametes which posses single copy of a chromosome. in fertilization two haploid gametes fuse to produce Zygote. then this zygote undergo several cell division (Mitosis) until it get enough number of cells for differentiation. 14.A.Homologus chromosomes are separated. in meiosis I the chromosome number get reduced. in this stage the first step is formation of synapsis where pairing of two homologous chromosomes occurs, and another major event is crossing over occurs between the homologous chromosomes results in exchange of genetic material. by the end of the meiosis I Homologous chromosomes are separated. 15.A. This statement is true for Mitosis and Meiosis II in the anaphase of the cell cycle both in Mitosis and Meiosis II, the chromatids are separated and migrated to opposite poles.chromatids separation are mediated by Kinetochore micortubules. 16.A.synapsis of chromosome synapsis is the event only observe in the meiosis I, where Pairing of the homologous chromosomes occurs. 17. 18.D.8 unique gametes from AaBbCCDdEE. the formula is 2 number of heterozygotes = there are 3 heterozygotes = 23 =8. so 8 unique gametes are produced form the genotype 19. C.1/2 BbTt × BBtt BBTt Black fur short tail BBtt Black fur long tail BbTt Black fur short tail Bbtt Black fur long tail 20.D.1 short tail - S is dominant over long tail - s
- 2. heterozygous to taillength - Ss Homozygous short tail mouse - SS SS × Ss SS Short Tail SS Short tail Ss Short tail Ss Short tail 21.D.interphase before both either meiosis or mitosis.BTBtbTbtBt BBTt Black fur short tail BBtt Black fur long tail BbTt Black fur short tail Bbtt Black fur long tail Solution 13.D. zygote in animal cells meiosis results in gametes which posses single copy of a chromosome. in fertilization two haploid gametes fuse to produce Zygote. then this zygote undergo several cell division (Mitosis) until it get enough number of cells for differentiation. 14.A.Homologus chromosomes are separated. in meiosis I the chromosome number get reduced. in this stage the first step is formation of synapsis where pairing of two homologous chromosomes occurs, and another major event is crossing over occurs between the homologous chromosomes results in exchange of genetic material. by the end of the meiosis I Homologous chromosomes are separated.
- 3. 15.A. This statementis true for Mitosis and Meiosis II in the anaphase of the cell cycle both in Mitosis and Meiosis II, the chromatids are separated and migrated to opposite poles.chromatids separation are mediated by Kinetochore micortubules. 16.A.synapsis of chromosome synapsis is the event only observe in the meiosis I, where Pairing of the homologous chromosomes occurs. 17. 18.D.8 unique gametes from AaBbCCDdEE. the formula is 2 number of heterozygotes = there are 3 heterozygotes = 23 =8. so 8 unique gametes are produced form the genotype 19. C.1/2 BbTt × BBtt BBTt Black fur short tail BBtt Black fur long tail BbTt Black fur short tail Bbtt Black fur long tail 20.D.1 short tail - S is dominant over long tail - s heterozygous to tail length - Ss Homozygous short tail mouse - SS SS × Ss SS Short Tail SS Short tail Ss Short tail Ss
- 4. Short tail 21.D.interphase beforeboth either meiosis or mitosis.BTBtbTbtBt BBTt Black fur short tail BBtt Black fur long tail BbTt Black fur short tail Bbtt Black fur long tail