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1) Before DNA sequencing, how were scientists able to determine the identity and number of chromosomes...

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Biology

1) Before DNA sequencing, how were scientists able to determinethe identity and number of chromosomes a person had?

2) What is scientifically accurate about the assumption that twoX chromosomes establishes the female sex? Under what genetic ordevelopmental conditions might two X chromosomes not result infemaleness? Under what genetic or developmental conditions might aphenotypically female contain a Y chromosome?

3) Assume a zygote started with a (1) XY (only) genotype, or (2)an XXY genotype. What mitotic events might have occurred duringearly embryonic development that could cause the person to haveboth XX and XXY cells as an adult?

Answer & Explanation Solved by verified expert
4.0 Ratings (666 Votes)
Question 1 Chromosomes When scientists discovered the cell and nucleus further studies led to the discovery of chromosomes It was first observed in plant cells Basophilic aniline dye was used to stain the chromatin material in the nucleus Later Gregor mendel discovered the inheritance of chromosomes Theophilus painter in the year 1923 using microscope counted 24pairs of chromosomes which means 48chromosomes Later in the year 1956 scientist    See Answer
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