BIOL 216 Lecture 1

Upslanting ________: the imaginary line that goes through the eye is slanted up.

________ occurs prior to mitosis and has three parts.

________: all the genetic information of an organism.

________: single line going down the hand as opposed to 2.

________ are immature sperm cells that are nonmotile.

________: some cells will have a normal chromosome count while other will have trisomy 21.

________: thread- like structure containing a collection of genes.

________ has 2 stages of arrest.

________: cap- like structure in sperm cells that has degradative enzymes to go through the eggs cell membrane.

Down ________ can also occur because of mitotic errors.

________: specific portions of the genome that code for proteins.

________: skin folds of the upper eyelid covering the inner corner of the eye.

________ are arrested in prophase I until ovulation happens.

________ are arrested in metaphase II until fertilization occurs.

________: proofreading duplicated chromosomes for any errors.

________: cellular contents are duplicated.

________ 21 is caused by meiotic nondisjunction: 2 homologous chromosomes /sister chromatids ending up in the same pole.

________: each of the 46 chromosomes are duplicated by the cell.

all the genetic information of an organism

specific portions of the genome that code for proteins

thread-like structure containing a collection of genes

cellular contents are duplicated

each of the 46 chromosomes are duplicated by the cell

proofreading duplicated chromosomes for any errors

2 genetically identical diploid daughter cells

2n2c germ cells

cap-like structure in sperm cells that has degradative enzymes to go through the eggs cell membrane

skin folds of the upper eyelid covering the inner corner of the eye

the imaginary line that goes through the eye is slanted up

single line going down the hand as opposed to 2

3 copies of chromosome 21

2 homologous chromosomes/sister chromatids ending up in the same pole

some cells will have a normal chromosome count while other will have trisomy 21