Simple Ingeritance In Animals And Plants

Question 0

How many chromosomes in each body cell

Answer 0

46

Question 1

Why do cells divide by mitosis (m-making i-identical t-two)

Answer 1

For growth of an organism and repair of damaged tissues

Question 2

Which type of cell division produces sex cells

Answer 2

Meiosis (m-making e-eggs)

Question 3

What molecule are genes made of

Answer 3

DNA

Question 4

What are alleles

Answer 4

Genes

Question 5

What is meant by genotype

Answer 5

Genetic make up which alleles does the individual inherit?

Question 6

What does heterozygous individual mean

Answer 6

The two alleles that they have are different (Dd)

Question 7

Mitosis

Answer 7

Making identical two- two identical calls being produced from the original cell

Question 8

Mitosis what happens

Answer 8

Normal body cell copy of chromosome pairs then cell division splits to two daughter cells with each 23 pairs of identical chromosomes as parent cell

Question 9

What are eggs and Sperm made by

Answer 9

Meiosis

Question 10

What are sex cells

Answer 10

Gametes

Question 11

What are the gametes

Answer 11

Sperm and ova

Question 12

Gametes have how many chromosome from each original pair

Answer 12

One chromosome

Question 13

Sexual reproduction results in variation why?

Answer 13

As gametes from each parent fuse, half genetic info comes from the father half from mother

Question 14

What type of cells are produced by meiosis

Answer 14

Sex cells

Question 15

Meiosis what happens

Answer 15

Each chromosome is made, cell divides twice to form four gametes (sex cells), each gamete has a single set of chromosomes each with a different combination of genes.

Question 16

Stem cells

Answer 16

Unspecialised cells that can differentiate

Question 17

Where can you find stem cells

Answer 17

Human embryo and adult bone marrow

Question 18

Which scientist worked out how characteristics are inherited

Answer 18

Grogor mendel a monk

Question 19

DNA

Answer 19

Very long molecule with double helix structure

Question 20

What dies a gene code stand for

Answer 20

Particular order of amino acids which make a specific protein

Question 21

Which sex chromosomes are found in the male and th female

Answer 21

Make - XY female - XX

Question 22

Dominant

Answer 22

If an allele masks the effect of another

Question 23

Recessive

Answer 23

The allele which the effect is being masked

Question 24

Phenotype

Answer 24

Physical appearance of characteristics

Question 25

Homozygous

Answer 25

Both alleles same (DD dominant dd recessive

Question 26

Three combinations of alleles

Answer 26

AA, aa, Aa

Question 27

Embryo screening

Answer 27

Tests to diagnose disorders before baby born

Question 28

Fossils

Answer 28

Remains of organisms many years ago found in rocks

Question 29

Extinction

Answer 29

Species that once existed have died out

Question 30

What can extinction be caused by

Answer 30

Disease, environment change, predator , catastrophic event

Question 31

Geographical isolation

Answer 31

When species can no longer interbreed

Question 32

How old is earth

Answer 32

4500 billion years

Question 33

Life began

Answer 33

3500 billion years ago

Question 34

How are fossils dated

Answer 34

As in rocks we can date rocks

Question 35

Why no fossils of early life forms

Answer 35

Cause didn’t have hard things that could be fossilised like bones teeth ect

Question 36

Shortest way to represent three billion in numbers

Answer 36

10^3

Question 37

Process of speciation

Answer 37

Isolation>genetic variation>alleles selected> interbreeding no longer possible>new species