WorksheetsIntroduction to Genetics
Total questions: 24
Worksheet time: 28mins
Complex molecule that carries genetic information that defines an organism's traits. It is stored in the nucleus.
DNA
protein
RNA
Glucose Nucleic Acid (GNA)
What is the definition of genotype?
The physical expression of a trait
The genetic combination of alleles
The genes on a DNA strand
The brand of blue-jeans that you wear
having two of the same genes for a trait (sometimes called purebred).
homozygous
heterozygous
protein
chromosome
zygomatic arch
The cells produced via meiosis are called:
Gametes
Somatic cells
Body cells
Nerve cells
A dog gives birth to 5 puppies. What percentage of the chromosomes does each puppy share with the mother?
25%
50%
75%
100%
What does heterozygous mean?
An organism that has the same genes for a trait (TT or tt)
An organism that has different genes for a trait (Tt)
When neither gene is fully dominant; offspring is a mixture of both
the different forms of a trait (hair color: brown, blonde, ginger
What is a phenotype?
The expression of a trait; what you see.
The genetic makeup of an individual
An organism that has the same genes for a trait (ex. TT or tt)
The passing of traits from parent to offspring
What is the gender of the individual whose karyotype is seen in the image?
Male
Female
What would indicate a normal human female?
XX
X
XY
XXY
XXX
A sperm contains
Both an X and a Y chromosome
Two X chromosomes
An X OR a Y chromosome
only a Y chromosome
A pair of chromosomes of same size, shape and gene sequence.
sister chromotids
centromeres
homologous chromosomes
autosomes
Females have .... and males have .... sex chromosomes.
XX, XY
XY, XX
XX, XX
XY, XY
Is this Karyotype human?
Yes
No
Impossible to Determine
What's wrong ???
Trisomy
Monosomy
Nothing, it looks normal.
What chromosome pair is affected in Down Syndrome?
23
18
13
21
The structure that holds two sister chromatids together until they separate for cell division is called a...
chromosome
chromatin
centromere
centriole
The structures labeled B are
centrioles
sister chromatids
centromeres
chromatin
