Vocab List Beckman Bio 183 Test I

Front 1

ACROSOME

Back 1

AN ORGANELLE AT THE TIP OF A SPERM CELL THAT HELPS THE SPERM PENETRATE THE EGG.

Front 2

ANGIOSPERM

Back 2

A FLOWERING PLANT, WHICH FORMS SEED INSIDE A PROTECTIVE CHAMBER CALLED AN OVARY.

Front 3

ANTHER

Back 3

THE TERMINAL POLLEN SAC OF A STAMEN INSIDE WHICH POLLEN GRAINS WITH MALE GAMETES FORM IN THE FLOWER OF AN ANTIOSPERM.

Front 4

ALTERNATION OF GENERATIONS

Back 4

A LIFE CYCLE IN WHICH THERE IS BOTH A MULTICELLULAR DIPLOID FORM, THE SPOROPHYTE, AND A MULTICELLULAR HAPLOID FORM THE GAMETOPHYTE; CHARASTIC OF PLANTS.

Front 5

CHIASMA (CROSSING OVER)

Back 5

THE X SHAPED, MICROSCOPICALLY VISIBLE REAGION REPRESENTING HOMOLOGOUS CHROMATIDS THAT HAVE EXCHANGED GENETIC MATERIAL THROUGH CROSSING OVER DURING MEIOSIS.

Front 6

CYTOKINESIS

Back 6

THE DIVISION OF THE CYTOPLASM TO FORM TWO SEPARATE DAUGHTER CELLS IMMEDIATELY AFTER MITOSIS.

Front 7

DIMORPHIC GENDER ALLOCATION

Back 7

THE PROPORTIONAL DISTRIBUTION OF REPRODUCTIVE ENERGY B/W FEMALE FERTILITY AND MALE FERTILITY (NOTE: DISTINCT FEMALE PARENT AND DISTINCT MALE PARENT

Front 8

DIMORPHIC LIFE CYCLE

Back 8

THE LIFE CYCLE IN WHICH THE ORGANISM SPENDS MOST OF THE TIME IN THE DIPLOID (2N) FORM.

Front 9

DIPLOID

Back 9

(2N) A CELL CONTAINING TWO SETS OF CHROMOSOMES, ONE SET FROM EACH PARENT.

Front 10

DOUBLE FERTILIZATION

Back 10

A MECHANISM OF GERTILIZATION IN ANGIOSPERMS, IN WHICH TWO SPERM CELLS UNITE WITH TWO CELLS IN THE EMBRYO SAC TO FORM THE ZYGOTE AND ENDOSPERM.

Front 11

EGG NUCLEUS

Back 11

SHIT IF I KNOW

Front 12

EMBRYO

Back 12

NEW DEVELOPING INDIVIDUALS

Front 13

EMBRYO SAC

Back 13

THE FEMALE GAMETOPHYTE OF ANGIOSPERMS, FORMED FROM THE GROWTH AND DIVISION OF THE MEGASPORE INTO A MULTICELLULAR STRUCTURE WITH EIGHT HAPLOID NUCLEI.

Front 14

EXTERNAL FERTILIZATION

Back 14

THE FUSION OF GAMETES THAT PARENTS HAVE DISCHARGED INTO THE ENVIRONMENT.

Front 15

ENDOSPERM

Back 15

a NUTRIENT RICH TISSUE FORMED BY THE UNION OF SPERM CELL WITH TWO POLAR NUCLEI DURING DOUBLE GERTILIZATION, WHICH PROVIDES NOURISHMENT TO THE DEVELOPING EMBRYO IN ANGIOSPERM SEEDS.

Front 16

FLOWER

Back 16

IN AN ANGIOSPERM, A SHORT STEM WITH FOUR SETS OF MODIFIED LEAVES, BEARING STRUCTURES THAT FUNCTION IN SEXUAL REPRODUCTION.

Front 17

FOLLICLE

Back 17

A MICROSCOPIC STRUCTURE IN THE OVARY THAT CONTAINS THE DEVELOPING OVUM AND SECRETES ESTROGENS.

Front 18

GENDER ALLOCATION

Back 18

THE PROPORTIONAL DISTRUBTION OF REPORDUCTIVE ENERGY BETWEEN FEMALE AND MALE FERTILITY.

Front 19

GAMETE

Back 19

A HAPLOID CELL SUCH AS AN EGG OR SPERM. gAMETES UNITE DURING SEXUAL REPRODUCTION TO PRODUCE A DIPLOID ZYGOTE.

Front 20

GAMETOPHYTE

Back 20

THE MULTICELLULAR HAPLOID FORM IN ORGANISMS UNDERGOING ALTERNATION OF GENERATIONS THAT MITOTICALLY PRODUCES HAPLOID GAMETES THAT UNITE AND GROW INTO THE SPOROPHYTE GENERATION.

Front 21

MEIOSIS

Back 21

A TWO STAGE TYPE OF CELL DIVISION IN SEXUALLY REPRODUCING ORGANISMS THAT RESULTS IN CELLS WITH HALF THE CHROMOSOME # AS THE ORIGINAL CELL.

Front 22

GONADS

Back 22

THE MALE AND FEMALE SEX ORGANS TEH GAMETE PRODUCIGN ORGANS IN MOST ANIMALS.

Front 23

GENERATIVE CELL

Back 23

GAMETE

Front 24

HAPLOID

Back 24

A CELL CONTAINING ONLY ONE SET OF CHROMOSOMES.

Front 25

HAPLOBIONTIC LIFE CYCLE

Back 25

THE LIFE CYLCLE THAT INVOLVES ZYGOTIC MEIOSIS.

Front 26

HERMAPHODITE

Back 26

AN INDIVIDUAL THAT PRODUCES BOTH EGG AND SPERM DURING SEXUAL REPRODUCTION, THEREFORE FUNCTIONING AS BOTH A MALE AND FEMALE.

Front 27

HETEROGAMY

Back 27

in sexual reproduction, the union of two types of sex cell (heterogamete) that are dissimilar in size, structure, and function.

Front 28

ISOGAMY

Back 28

A CONDITION IN WHICH MALE AND FEMALE GAMETES ARE MORPHOLOGICALLY INDISTINGUISHABLE.

ENCARTA->the fusion of isogametes in some algae and fungi during reproduction

Front 29

INTERNAL REPRODUCTION

Back 29

REPRODUCION IN WHICH SPERM ARE TYPICALLY DEPOSITED IN OR NEAR THE FEMALE REPRODUCTIVE TRACT AND FERTILIZATION OCCURS WITHIN THE TRACT.

Front 30

Meiosis II

Back 30

the stages of meiosis II are like that of mitosis...it takes seperately but simultaneously in each of the two groups of chromatids.

Front 31

megaspore

Back 31

a spore from a heterosporous plant that develops into a female gametophyte bearing archeogonia

Front 32

megasporocyte

Back 32

(2n) meotic diviosion-> 4megaspores

Front 33

microspore

Back 33

a spore from a heterosporous plant that develops into a male gametophyte with antheridia.

Front 34

homologous chromosomes

Back 34

chromosome pairs of the same lenghth, centromeres position, and staining pattern that posses genes for the same charcters at corresponding loci. One homologous chromosome is inhereited from each parent of the organism.

Front 35

Protogyny

Back 35

female first

Front 36

protandry

Back 36

male first

Front 37

parthenogenesis

Back 37

a type of reproduction in which females produce offspring from unfertilized eggs.

Front 38

sporophyte

Back 38

The multicellular diploid form in organisms undergoing alternation of generations that results from a union of gametes ant that results froma union of gametes and that meiotically produces haploid spores that grow into the gametophyte generation.

Front 39

synapsis

Back 39

the pairing of replicated homologous chromosomes during prophase I of meiosis.

Front 40

syngamy

Back 40

the process of cellular union during fertilization

Front 41

oogamy

Back 41

a condition in which the male and female gametes differ, such that a small, flagellated sperm fertilizes a large, nonmotile egg.

Front 42

ovary

Back 42

female zygote

In flowers, the portion of a carpel in which the egg containing ovules develop.

In animals, the structure that produces female gametes and reproductive hormones

Front 43

ovule

Back 43

a structure that develops in the plant ovary and contains the female gametophyte.