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Because in telophase 1 nucleus is formed around the chromosomes, anaphase 1 seprate homologous chromosomes on 2 poles so in telophase 1 seperated chrompsomes on 2 poles develop nuclear envelop around them so each nucleus have half number of chromosomes than anaphase 1 and so is with DNA amount.

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@BioBloom Animal cells aslo have small vacuoles but very less in number, they store waste products.

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@saniaAnwar-vo8xt Mammalian mature Rbcs are devoid of all cell organelles and nucleus, and they contain only hemoglobin which carry out oxygen transport. I have make the video regarding all details about rbcs and Hb you can watch it Video link- Red blood cells || RBCs || Erythrocytes and Hemoglobin ua-cam.com/users/shortsLK4RtB2Z-_8?feature=share

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Plastids are absent in animals because: Animals are mobile organisms, which means that they can move around to obtain their food. They can fulfill their nutritional requirement by preying or obtaining food from other sources. Therefore, they do not require any pigments which help in synthesising food through photosynthesis. Plants on the other hand, are immobile and require to synthesise their own food in order to survive.

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@ONSTUDY720 Plasmids are absent in animal cells 1. Because in animal cell linear DNA is present inside the Nucleus, along with enzymes specialized for the Replication of linear DNA and Transcription, Plasmid do not enter in the Nucleus. 2. Plasmid is circular extra chromosomal DNA which provide resistance to bacteria from many antibiotics, but animal cell have well developed immune system so no need for any resistance by plasmid, but even if plasmids present in animsl cell the animal cell have capacity to distroy it. 3. Plasmid in bacterial cell can transfer to other bacteria by conjugation but animal cells undergo mitosis which leads to transfer of genetic material to daughter cells. 4. Animal cells do not have pathogenic nature so not have plasmids, bcz bacterial plasmids are most commonly have some genes which encode some toxins, to kill other bacteria. There are many more reasons that why animal cells do not have plasmids.

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@aviatorboy19 i want to know that you are preparing for any competitive exam?? And i am going to start online classes if you are interested let me know.

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@RakshaMishra1808 Meiosis is a reductional division. Meiosis 1 is responsible for reduction of chromosomes Number but not amount of DNA.- in Metaphase 1 - Number of chromosomes is 2n and amount of DNA is 4c, Anaphase1 Number of chromosomes is 2n and amount of DNA is 4c, Telophase 1- Number of chromosomes is 1n and amount of DNA is 2c, Meiosis 2 is responsible for reduction of chromosomes Number and amount of DNA. Number of chromosomes is 1n and amount of DNA is 1c.

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@analikumari Wach full video for full detailed process, Barr Body || Inactivation of X- Chromosome || Formation of Barr Body || Role of XIST and TSIX ua-cam.com/video/q4nrWm6jf7w/v-deo.html

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@venupal i m not able to understand what you are asking about please repeat your question in single comment

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@NiranjanJayasingh Unipolar nurons extend one process from cell body, this single process bifurcate into two branches to form peripheral axone and central axone (single process arise from cell body thats why we call it as unipolar neuron)