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Most of the growth in you body occurs because your cells

divide

the stage in a cell's life when it is not in the process of dividing is called

interphase

what material in the cell makes up chromosomes?

nucleic acids

what ratio increases when a cell divides into two smaller cells?

surface area to volume

the process of cytokinesis results in

two genetically identical daughter cells

a cell's chromosomes must be duplicated before mitosis occurs so that

each daughter cell gets a full number of chromosomes

binary fission differs from mitosis because the new cells

live independently of the parent cell

if a starfish is cut in half, it can regrow its missing body through

regeneration

which is an example of reproduction

binary fission in unicellular organisms

which sequence is correct for mitosis

chromoesomes form, chromosomes line up, chromosomes separate, nuclei form

which is an example of an acquired trait

ability to read

the unit of heredity that determines a particular trait is known as

a gene

a human female would have which set of sex chromosomes

XX

if one copy of a dominant allele is present in a genotype, then the trait the allele codes for is

expressed in the phenotype

if one parent has two dominant alleles and another parent has two recessive alleles, the offspring will have

the dominant phenotype

cells that contain half the usual number of chromosomes are

gametes

the process that produces haploid (1n) cells is known as

meiosis

what happens when fertilization occurs

two 1n cells combine into a new cell

which does not occur during meiosis

two diploid daughter cells are produced

after mitosis, the number of chromosomes in a daughter cell is

the same as the number in the parent cell

during meiosis, cell divide

twice

one organism produces one or more offspring that are exact duplicates of itself

asexual reproduction

form of asexual reproduction performed by prokaryotes (cells that do not have a well defined nucleus)

binary fission

binary fission occurs when

the parent organism splits in two

both unicellular and muticellular organisms can reproduce by

budding

the process in which an organism develops tiny buds on its body

budding

each bud forms from the parent's cell

so the bud's genetic material is the same as the parent

the process of new tissure growth at sites of a wound or lost limb

regeneration

some single celled organisms like paramecia may reproduce by dividing into two new cells. Which is a characteristic of this kind of reproduction

the new cells are identical to the parent cell

the reasons why cells reproduce by asexual reprodiction

1.growth
2.repair
3.replacement

mitosis cycle ( there are 5 phases to cell replication)

interphase, prophase, metaphase, anaphase, telophase, cytokinesis

different tissues working together to perform a particular function make up

an organ

DNA is located in a membrane bound nucleus of a cell

eukaryotes

an animal cells and plant cells are

eukaryotes

characterized by the absence of a distinct, membrane-- bound nucleus, and by DNA that is not organized into chromosomes

prokayotes

bacteria are

prokaryotes

some diseases in humans are caused by genetic mutations. The mutated genes can then be passed from parent to child. Where does the replication of the mutated genes occur in the human cell?

nucleus

the nomal sequence of development and division of a cell

celll cycle

the process in which the nucleus divides to form two new nuclei and is a sexual reproduction

mitosis

muscles need an electrical signal, usually from the brain, to contract. Without a source of energy, the contraction cannot take place. At which structural leel do muscles convert substances from food into energy for movement?

cell

a form of intermediate inheritance in which one allele for a special trait is not completely domiant over the other allele. This result in combined phenotype

incomplete dominance

a reproductive cell having one half the number of chromosomes, capable of fusing with a gamete of the opposite sex to prodice the fertilized egg

gametes

states that the members of each pair of alleles separate when gametes are formed. A gamete will recei e one allele or the other

Law of Segregation

states that two or more paires of alleles segregate independently of one another during gamete formation

Law of Independent Assortment

various forms of the same gene are called

alleles

all of the cells in your hand have

one complete copy of DNA

an expressed characteristic is produced by a pair of hereditary factors known as

ganes

a threadlike linear strand of DNA and associated proteins in the nucleus of eukaryotic cells that carries the genes and functions in the the transmission of hereditary information

chromosome

how many chromosomes does human have

humans have a total of 46 chromosomes in each cell, including two sex chromosomes

the study of heredity, a study of how certain characteristics are passed on from parent to children

genetics

an organisms's traits are determined by

genes

a gene usually consists of a pair of hereditary factors called

alleles

when discussing the physical appearance of an organism er refer to its

phenotype

the genetic makeup of an organism is referred to as its

genotype

what tells us which alleles the organism possesses

genotype

when an organism has two identical alleles for a given trait

homozygous

if an organism has two different alleles for a given trait

heterozygous

particles and waves acan be defined by their unique characteristics, yet they do have similarities. Which of the following is a unique characteristic of a particle

mass

on a hot day warm cans of soda are placed i a cooler containing ice and the container is closed. in which direction does the thermal energy flow

from the soda to the ice

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