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 Genes and Inheritance 50 Flashcards |
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What are chromosomes and where are they located? |
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ChromosomesUnderstanding Chromosomes: Key Cellular Structures
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Fill in the blank: Chromosomes are only visible under a light microscope during ___. |
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Cell division  |
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True or False: Human cells contain 44 chromosomes. |
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False. Human cells contain 46 chromosomes.  |
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What is the significance of giant chromosomes found in fruit flies? |
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Giant ChromosomesThe Significance of Giant Chromosomes in Fruit Flies
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Fill in the blank: Each chromosome contains hundreds of ___ arranged in a specific sequence along its length. |
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Genes  |
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Riddle: I am found in the nucleus and control the traits you see; I come in pairs and can be long or short. What am I? |
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Chromosomes  |
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How are chromosomes numbered in human cells? |
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Chromosomes NumberingHow Chromosomes Are Numbered in Human Cells
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Fill in the blank: Just before cell division, each chromosome duplicates itself, forming a ___ shape. |
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Cross-like  |
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Multiple Choice: How many chromosomes do mango tree cells have? A) 46 B) 8 C) 40 D) 23 |
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C) 40  |
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What is the approximate number of genes found on human chromosome 1? |
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Approximately 2,000 genes.  |
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Fill in the blank: DNA is composed of two strands that twist around each other to form a ___ structure. |
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Double helix  |
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True or False: Gametes in humans contain 46 chromosomes. |
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False. Gametes contain 23 chromosomes.  |
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Which type of cells are sperm and egg cells classified as? |
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Gametes  |
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Riddle: I contain the instructions for building a cell and am too small to see with regular microscopes. What am I? |
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DNA  |
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What specific roles do some genes on chromosome 15 play in human traits? |
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They determine eye color.  |
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Fill in the blank: Variations in traits arise from different versions of genes, such as one version resulting in ___ eyes. |
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Blue  |
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How many twists does a single gene in a DNA molecule contain? |
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About 2,500 twists.  |
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What is the main function of gametes in human reproduction? |
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To combine and initiate the development of a new human life.  |
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Sperm cells have a nucleus containing ___ chromosomes. |
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23 chromosomes  |
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Fill in the blank: The process where a sperm cell joins with an egg cell is called ___ . |
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Fertilisation  |
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True or False: Egg cells can move independently like sperm cells. |
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False. Egg cells cannot move independently.  |
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What is the function of the food reserves in egg cells? |
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They support early development of the embryo after fertilisation.  |
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Riddle: I am smaller than an egg, I swim with great might, I have 23 chromosomes, and I make life take flight. What am I? |
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A sperm cell  |
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Fill in the blank: The zygote formed after fertilisation contains ___ chromosomes. |
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46 chromosomes  |
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What determines a person's sex based on their chromosomes? |
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The presence of two X chromosomes (XX) for females or one X and one Y chromosome (XY) for males.  |
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Completed! Keep practicing to master all of them. |
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