Worksheets1st 9 Weeks 8th Grade Science
Total questions: 55
Worksheet time: 29mins
_________ reproduction involves 2 parent cells, a sperm and an egg.
Sexual
Asexual
______ reproduction involves 1 parent organism duplicating itself (copying)
Sexual
Asexual
Offspring are identical to the parent
Sexual
Asexual
Offspring are not identical to the parent, but contain genes from both
Sexual
Asexual
This type of reproduction produces offspring that are unique or different from the parents and siblings
Sexual
Asexual
This type of reproduction produces offspring quicker.
Sexual
Asexual
This type of reproduction requires more time and energy.
Sexual
Asexual
The hydra in the picture produces a bud that is a copy of itself. When mature, the bud will fall off and be a new organism.
Sexual
Asexual
Bacteria will produce offspring by dividing in half during binary fission.
Sexual
Asexual
Males will pass DNA to sperm cells, and females will pass their DNA to egg cells to produce an offspring.
Sexual
Asexual
A sperm and an egg join together in a process called
mitosis
meiosis
fertilization
fission
___________ reproduction has the advantage of increasing genetic variation.
Sexual
Asexual
Fission
Budding
Sex cells are produced by _____________.
photosynthesis
zygotes
meiosis
mitosis
Organisms produced by asexual reproduction are genetically different from the parent organism.
False
True
An exact copy of a cell/organism is produced...
Mitosis
Meiosis
Brown Bears reproduce sexually, so all the baby bears are...
different.
the same.
Identical copies are most related to...
Mitosis and Sexual Reproduction
Meiosis and Asexual Reproduction
Mitosis and Asexual Reproduction
Meiosis and Sexual Reproduction
At the end of mitosis you have _____ cells.
identical
different
identical twins
variety
The products of meiosis are genetically...
different.
identical.
Identify a purpose of mitosis. Select all that apply.
Produce gametes for reproduction.
Repair damaged or dead cells.
Reduce the chromosome number.
Growth of organisms from birth to adulthood.
Suppose a diploid animal cell has 16 chromosomes. How many chromosomes would a sex cell of this animal have
16
8
32
23
All cells in your body have genetic information (the code found within DNA). Sex cells (egg and sperm) have ________________ the amount of genetic information when compared to the body cells in your body
twice
equal
half
four times
In which phase does crossing-over happen?
Prophase I
Prophase II
Metaphase I
Anaphase II
What phase is this?
Prophase I
Metaphase II
Anaphase I
Telophase II
What phase is this?
Metaphase I
Prophase II
Telophase I
Anaphase II
What phase is this?
Metaphase II
Prophase I
Telophase I
Anaphase II
What phase is this?
Metaphase II
Prophase I
Telophase I
Anaphase I
What phase is this?
Telophase II
Anaphase II
Telophase I
Anaphase I
What phase is this?
Anaphase II
Telophase I
Telophase II
Anaphase I
Which term describes the different forms of a gene
Chromosome
Allele
DNA
Punnett Squares
Aa, DD, Bb, yy are all examples of _______
genotypes
phenotypes
A person who breeds animals keeps careful records of the fur color of parents and offspring from each generation. The fur color is a trait transferred from generation to generation.
What are the structures that carry the information for these traits called?
organelles
genes
muscles
cytoplasm
Which of the following is a heterozygous genotype?
FF
Dd
ss
UU
What is a phenotype?
An observable characteristic
The combination of alleles
The sister chromatids
The location of a gene on a chromosome
What is this genotype considered?
(GG)
Heterozygous
Homozygous recessive
Heterozygous Dominant
Homozygous Dominant
Which is the homozygous recessive genotype?
Ee
bb
Blonde Hair
What is this considered?
(Brown Eyes)
A genotype
Genetic Makeup
An allele
A phenotype
If you crossed two heterozygous parents with one another (Qq). What are the chances of having an offspring that is homozygous recessive?
50%
100%
25%
75%
What is an allele?
An observable characteristic.
The phenotype of an organism.
A location on a genome.
Different variations of a gene.
A person who is homozygous for a trait can have a genotype of....
AA, Aa
Aa, aa
AA, aa
aa
If a person is heterozygous for a trait, their genotype can be...
Aa
AA, aa
AA, Aa
AA
If "B" represents brown hair, and "b" represents blond hair, what will the genotype be for a homozygous brown haired person?
BB
Bb
bb
P= purple petals and p= white petals. What genotype(s) would result in purple petals?
pp
Pp, pp
PP, Pp
PP, pp
How many copies of the recessive gene must there be for that phenotype to show up?
1
2
3
4
What is the missing pairing?
AA
Aa
aa
An allele that is hidden whenever the dominant allele is present.
recessive
dominant
allele
gene
What percentage of Susie's kids will have blue eyes if she is homozygous recessive and dad is heterozygous dominant?
B= dominant brown eyes
b= recessive blue eyes
10%
25%
50%
75%
