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Biology GCSE WJEC unit 2 (triple higher) > Cell Division and Stem Cells GLOSSARY KEYWORDS + more > Flashcards

Cell Division and Stem Cells GLOSSARY KEYWORDS + more Flashcards

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1
Q

Gene

A

A section of DNA that determines one inherited characteristic

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2
Q

Tumor

A

A mass of cells that divide uncontrollably

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3
Q

Embryonic

A

From within an embryo

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4
Q

Meiosis

A

Cell division that produces 4 daughter cells (genetically different) - have half the number of chromosomes of the mother cells
involves 2 divisions - producing 4 gametes

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5
Q

Differentiate

A

To change structure and function

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6
Q

tissue typing

A

A process of testing the antigens on cells to reduce the risk of rejection

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7
Q

Cancer

A

A disease resulting from uncontrolled mitosis

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8
Q

Cell division

A

Process of making new cells by copying and splitting existing ones

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9
Q

Stem cell

A

An undifferentiated cell that has the capacity to develop into specialised cells

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10
Q

Specialised

A

Having a particular shape suitable for a function

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11
Q

rejection

A

When tissues are attacked by the bodies defence system (white blood cells)

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12
Q

mitosis

A

cell that produces TWO daughter cells that are (genetically IDENTICAL) - and have the SAME number of chromosomes as the mother cell
involves 1 division
functions: repair + replacement

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13
Q

gamete

A

sex cell (contains half the chromosome numbers)

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14
Q

Chromosome

A
  • a linear DNA molecule tightly coiled around proteins
  • contains genes
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15
Q

how many chromosomes do human bodies contain?

A

46 (23 pairs)

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16
Q

Who has XY chromosomes

A

Males

17
Q

who has XX chromosomes

A

Females

18
Q

Why is mitosis important in organisms

A

-asexual reproduction
-growth
-repair of damaged cells
-cell replacement

19
Q

Why is meiosis important for sexual reproduction

A

-increases genetic variation
-insures that the resultant zygote has a full set of chromosomes

20
Q

Where are chromosomes found

A

Nucleus

Biology GCSE WJEC unit 2 (triple higher) (12 decks)

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