WorksheetsT1 Wk4 Homework Task
Total questions: 25
Worksheet time: 24mins
Name
Class
Date
1.
How many TOTAL chromosomes do humans have?
a)
2
b)
44
c)
46
d)
23
2.
This is a picture of chromosomes arranged in homologous pairs---what is it called?
a)
Genome
b)
Punnett Square
c)
Karyotype
d)
Autosomal cells
3.
Looking at the karyotype, is this person male or female?
a)
There is no way to tell from a karyotype.
b)
Male
c)
Female
d)
This person has a genetic disorder
4.
This is a chart used to analyze the pattern of inheritance that shows the relationships in a family.
a)
pedigree
b)
genotype
c)
genome
d)
karyotype
5.
What is the probability that a human sperm cell will carry a X chromosome?
a)
50%
b)
100%
c)
25%
d)
0%
6.
The genotype of the affected son and daughter at the bottom of this pedigree...
a)
homozygous dominant
b)
homozygous recessive
c)
heterozygous
d)
Can't tell
7.
Imagine you are performing a cross involving seed color in garden pea plants. What F1 offspring would you expect if you cross true-breeding parents with green seeds and yellow seeds? Yellow seed color is dominant over green.
a)
100 percent yellow-green seeds
b)
100 percent yellow seeds
c)
50 percent yellow, 50 percent green seeds
d)
25 percent green, 75 percent yellow seeds
8.
A recessive trait will be observed in individuals that are ________ for that trait.
a)
heterozygous
b)
homozygous or heterozygous
c)
homozygous
d)
diploid
9.
Meiosis results in ______.
a)
4 genetically distinct haploid gametes
b)
2 genetically distinct cells
c)
2 genetically identical cells
d)
4 genetically identical cells
10.
The chromosomes that pair up during meiosis, are called __________ chromosomes.
a)
homozygous
b)
asexual
c)
homologous
d)
genes
11.
When an area of a chromatid is exchanged with the matching area on a chromatid of its homologous chromosome, _________________ occurs
a)
crossing over
b)
mutagenesis
c)
hybridization
d)
fertilization
12.
The observable outward manifestation of the genes of an individual is referred to as its
a)
blueprint
b)
genotype
c)
phenotype
d)
genetic map
13.
Chromosomes that do NOT play a role in determining the sex of an individual are called
a)
sex chromosoems
b)
X and Y
c)
autosomes
d)
A and B are correct
14.
If a particular pedigree follows a sex-linked recessive trait, you would expect to see
a)
more affected females
b)
all carrier males
c)
more affected males
d)
an equal number of affected males and females
15.
The red and blue pair of chromosomes in the bottom row are
a)
genetically identical
b)
carrying the same genes, but different alleles
c)
carrying completely different genes
d)
carrying the same genes and the same alleles
16.
The physical appearance of an organism based on traits
a)
Genotype
b)
Phenotype
c)
Meiosis
d)
Genetics
17.
Which of the following best explains why the chromosome number is an even number in organisms?
a)
It is only by coincidence, many organisms have an odd number
b)
The diploid number is always even so that when mitosis occurs each cell gets the same number of chromosmes
c)
The diploid chromosome number represents pairs of chromosomes, one from ech parent, so that it is always an even number
d)
Chromosomes double very time the cell divides, so after the first division, the number is always even
18.
Fruit fly body cells have 8 chromosomes. After mitosis, you would expect a resulting fruit fly daughter cell to have ...
a)
16 chromosomes.
b)
46 chromosomes.
c)
8 chromosomes.
d)
4 chromosomes.
19.
Which of the following contributes to genetic variation in sexually reproducing species?
a)
crossing over, internal fertilization, independent assortment
b)
independent assortment, spindle formation, random fertilization
c)
random fertilization, DNA synthesis, independent assortment
d)
random fertilization, independent assortment, crossing over
e)
internal fertilization, spindle formation, crossing over
20.
What is a gene?
a)
An entire chromosome that codes for a trait
b)
a piece of clothing
c)
a piece of a DNA on chromosome that codes for a trait
d)
Chemical messengers in your brain that code for a trait
21.
The genetic code of an organism
a)
Teletype
b)
Genotype
c)
Mesotype
d)
Phenotype
22.
This means Different Gene
a)
Dominant
b)
Recessive
c)
Homozygous
d)
Heterozygous
23.
____________________ are used to make predictions about the genotypes and phenotypes of offspring.
a)
Dominant Squares
b)
Punnett Grids
c)
Punnett Squares
d)
Recessive Squares
24.
What are the two genotypes that show the DOMINANT Phenotype
a)
GG, gg
b)
GG, Gg
c)
Gg, gg
25.
How many are tall?
a)
0
b)
1
c)
2
d)
4
100 %
