Ch.3 - Bio Found., Genetics, Prenatal Dev & Birth

Question 1

Gamates contain info on molecular structures called

Answer 1

Genes

Question 2

Genes form threads called

Answer 2

Chromosomes

Question 3

Each kind of gamate contains how many chromosomes?

Answer 3

23

Question 4

Each cell contains how many chromosomes?

Answer 4

46

Question 5

Each chromosome contains how many genes?

Answer 5

Up to 20,000

Question 6

A zygote is formed by

Answer 6

Two gamates

Question 7

Ovum contain _ chromosome, sperm contain _ chromosome

Answer 7

X, X or Y

Question 8

Embryos are bisexual for

Answer 8

The first few weeks

Question 9

Between weeks 4-6, gonads develop into

Answer 9

Testes or ovaries

Question 10

The presence of the Y chromosome during germinal development results in

Answer 10

The testis-determining factor

Question 11

The pre-birth stages of physical development are

Answer 11

Germinal (0-2), embryonic (3-8) a and foetal (9-birth)

Question 12

Monozygotic twins contain ___ of twin’s genes, dizygotic twins contain ___

Answer 12

100%, 50%

Question 13

How do adopted children indicate developmental variance?

Answer 13

Genetic variance factors

Question 14

How do separated twins provide information about development?

Answer 14

Social development (as they are genetically similar/same)

Question 15

Down syndrome is an example of

Answer 15

Chromosome abnormality

Question 16

Genetic transmission occurs with the combination of two

Answer 16

Gamates

Question 17

Teratogens are detrimental to

Answer 17

The development of the baby at all stages

Question 18

The main assessable prenatal domain is

Answer 18

Physical