True or False /correct the false
atoms are the basic unit of life
False - Cells are the basic unit of life
The DNA is arranged in ______________.
chromosomes
nucleus
centromere
gene
eye color
eye color since it is not part of the genetic material inside a cell
There are two different types of reproduction of a cell
True
the ______________is the membrane that surrounds the nucleus.
nuclear membrane
down syndrome
trisomy 21
chromosome 18
three copies of chromosome 21
chromosome 18 - since down syndrome is caused when a person inherits three copies of chromosome 21
DNA stands for deoxynucleic acid
False - DNA stands for deoxyribonucleic acid.
Each chromosome has a _____________ and its positions ____________from an individual to another.
differs
46 chromosomes
23 pairs
47 chromosomes
male or female
47 chromosomes since all the other describe a normal individual whereas 47 chromosomes describe one with a disorder
The structure of a DNA is a double helix
True
The ___________ is important in cell division because other molecules can attach to it. Each chromosome contains many ___________ that control specific characteristics such as eye color.
centromere
genes
copying their nucleus
complicated reproduction
single-cell organisms
dividing in two
complicated reproduction - since it is that of large-cell organisms
A person suffering from Trisomy 21 has the same number of chromosomes as that suffering from Edwards syndrome
False - (oral explanation)
The male posses an ____________ gene whereas the female an ____________ gene in its karyotype.
XY
XX
found in pairs
inherited from each parent
section of DNA
has a centromere
section of DNA - since it is a characteristic of the chromosome whereas all others are.