Module 5.2 : Fetal Embryology Defintions Flashcards Preview

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Flashcards in Module 5.2 : Fetal Embryology Defintions Deck (10)
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1

Haploid

- single set unpaired chromosomes (23)
- a cell with 46 chromosomes divides into 2 new cells, each with 23 chromosomes (by meiosis)

2

Diploid

- paired chromosomes
- organism with 46 chromosomes (23 pairs)

3

Triploid

- 3 complete chromosome sets (69 chromosomes)
- 2 sperms or non fully divided ovum
- lethal

4

Trisomy

- one extra chromosome present in each cell additional to normal diploid
- trisomy 21 extra chromosome 21
+ Down syndrome
- karyotype now 47xx or xy

5

Mitosis

- Process of nuclear division where cellular material is equally divided between both daughter cells
- All cells except gamete cells

6

Meiosis

- process that reduces the number of chromosome in gametes to half

7

Chromosome

- thread like nucleoprotein structure within the nucleus of the cell that contains DNA

8

DNA

- double strand nucleic acid that is constituent of chromosomes
- contains hereditary info coded in specific sequences

9

Gene

- hereditary unit that carries hereditary traits
- for self reproducing
- the arrangement of DNA in a chromosome

10

Karyotype

- chromosome set of an individual
- described in terms of both number of chromosomes
- representation of chromosomes set in a diagram