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Flashcards in Prenatal Development Deck (66)
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1

Average weight gain during pregnancy:

20-35lbs

2

pregnancy produced hypertension

Preeclampsia

3

Peeclampsia SandS (5)

- Significant change in BP after 24wk marker
- Sudden increase/change in edema
- excessive weight gain (beyond 35 lbs)
- Headaches
- Visual disturbances

4

Each egg and sperm has _#_ chromosomes.

23

5

A person's 46 chromosomes have about _#_ genes.

25,000

6

The first 22 pairs of chromosomes are called _____.

autosomes

7

The 23rd pair of chromosomes are _____ chromosomes.

sex

8

The functional units of heredity; they determine the production of chemical substance that are the foundation for characteristics and abilities

genes

9

_____ regulate the development of all human characteristics and abilities

genes

10

the complete set of genes that make up a person's heredity

genotype

11

features that are produced from the interaction between genes and the environment

phenotype

12

genotypes produce ______. If the alleles are the same they typically produce that ______. If they are different, depends on dominant or recessive alleles

phenotypes

13

If 2 alleles for disease are present, the child is ____ ____ to develop the disease.

more likely

14

When the ____/____ have more or less than 23 chromosomes, the individual does not receive 46 chromosomes.

sperm/egg

15

Abnormal ______ chromosome pairings can also disrupt development

sex

16

traits that are controlled by a single gene

either-or phenotypes

17

Many separate genes influence behavioral and psychological characteristics

polygenic inheritance

18

Studies use twins and adopted children to better understand ____ ____.

poygenic inheritance

19

_____ influences typically make children within a family different.

environmental

20

prenatal development lasts on average __#__ weeks.

38

21

Prenatal development begins when:

sperm successfully fertilizes an egg

22

The 3 stages of prenatal development are:

- zygote
- embryo
- fetus

23

1st trimester is week _#_ to week _#_

week 1 - week 12

24

2nd trimester is week _#_ to week _#_

week 13 - week 27

25

3rd trimester is week _#_ to week _#_

week 28 - birth

26

Stage where there is a newly fertilized egg. 2 individual sets of 23 chromosomes are interchanged, one from each parent

Zygote Stage

27

Zygote stage's time frame ranges:

from conception to early implantation (week 1 and 2)

28

Stage where development includes:
- umbilical cord
- eyes, arms and legs
- brain and nervous system
- heart starts to beat around 4 weeks

Embryo stage

29

during the _____ stage, blood vessels allow exchange of nutrients, oxygen, vitamins, and waste products through the umbilical cord

Embryo Stage

30

_____ is most sensitive to environmental toxins

embryo