Tutorial 3: Find the word

Bivalent

A structure in which two pairs of homologous sister chromatids have synapse. (Brooker, 2009)

Chiasma

The site where the crossing over occur between the two chromosomes. (Brooker, 2009)

Chromosome

Structure in the cell nucleus that consist of chromatin and genes. (Eldra P. Solomon, Linda R. Berg, Diana W.Martin, 2005)

Crossing over

A process in which genetic materials (DNA) is exchanged between paired, homologous chromosome. (Eldra P. Solomon, Linda R. Berg, Diana W.Martin, 2005)

Diakinesis

The fifth phase stage prophase of meiosis I. (Brooker, 2009)

Diplotena

The fourth stage of prophase in meiosis I. (Brooker, 2009)

Egg cell

It is female gamete that is usually very large and no motile. (Brooker, 2009)

Embryo sac

The female gametophyte generation in flowering plants. (Eldra P. Solomon, Linda R. Berg, Diana W.Martin, 2005)

Endosperm          

The 3n nutritive tissue that is form at some point in the development of all angiosperm seed. (Eldra P. Solomon, Linda R. Berg, Diana W.Martin, 2005)

Fertilization

The union of gametes to begin the new life of an organism. (Brooker, 2009)

Gametophyte

The haploid generation of the plants. (Brooker, 2009)

Heterogamous

Describe a species that produces two morphologically different types of gametes. (Brooker, 2009)

Isogamous

Describe the morphologically similar gametes. (Brooker, 2009)

Leptotene

The first stage in prophase I where the chromosome start to condense (Neil, 2005)

Meiosis

A form of nuclear division in which the sorting process result in a production of haploid cell. (Brooker, 2009)

Oogenesis             

Production of female’s gametes. (Eldra P. Solomon, Linda R. Berg, Diana W.Martin, 2005)

Pachytena

The third stage in prophase I (Eldra P. Solomon, Linda R. Berg, Diana W.Martin, 2005)

Pollen grain

 The immature male gametophyte of seed plants that produces sperm that capable for fertilization. (Eldra P. Solomon, Linda R. Berg, Diana W.Martin, 2005)

Reciprocal cross

A pair of crosses in which the traits of the two parents differ with regard sex. (Brooker, 2009)

Sex chromosome

A pair of chromosome that determine sex in a species.

Sperm cell

The motile reproductive cell of animals n some plants and protist

Spermatogenesis

The production of male gametes by meiosis and subsequent cell differentiation. (Eldra P. Solomon, Linda R. Berg, Diana W.Martin, 2005)

Sporophyte

The diploid generation of plants (Brooker, 2009)

Synapsis

The process of physically association of homologous chromosome during prophase in meiosis I. (Eldra P. Solomon, Linda R. Berg, Diana W.Martin, 2005)

Synaptonemal complex

The structure, visible with the electron microscope, produced when homologous chromosome undergo Synapsis. (Eldra P. Solomon, Linda R. Berg, Diana W.Martin, 2005)

Tetrad

The chromosome complex formed by the process of Synapsis of a pair of chromosome homologous.

X-linked genes

A gene carried on an X chromosome. (Eldra P. Solomon, Linda R. Berg, Diana W.Martin, 2005)

Zygotena

The third stage in prophase I (Eldra P. Solomon, Linda R. Berg, Diana W.Martin, 2005)