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Worksheetsmeiosis & heredity review
Total questions: 19
Worksheet time: 10mins
Which event is an important factor in increasing variety among sexually reproducing organisms?
crossing over
gene linkage
tetracross
mitosis
The exchange of segments of DNA between the members of a pair of chromosomes __________.
always produces genetic disorders
is called genetic crossing
acts as a source of variations within a species
ensures that variations within a species never occur
Which best describes the process of meiosis?
occurs in body cells
results in genetically identical cells
produces 4 haploid gametes
happens only in haploid cells
At the beginning of which of these does the process of organizing and condensing DNA into its compact form take place?
mitosis
metaphase
interphase
cytokinesis
What is the term for a cross that involves just one trait, such as a pod shape? Choose the correct answer.
dihybrid cross
homozygous cross
test cross
monohybrid cross
In which way is human DNA organized?
23 pairs of chromosomes
23 pairs of autosomes
total of 23 chromosomes
23 pairs of sex chormosomes
during which of these does the separation of homologous chromosomes occur?
mitosis
meiosis I
meiosis II
fertilization
What happens to chromosomes when crossing over takes place?
decrese in number
produce new genes
mutate in the first division
exchange corresonding segments of DNA
what happens to the sister chromatids in meiosis II?
they duplicate
they do not take part
they are divided
the remain together
which term applies to an individual who possesses two recessive alleles for the same trait?
mutated
haploid for the trait
heterozygous for the trait
homozygous for the trait
which term applies to all the genetic material contained in an individual or a species?
genome
genetic code
epidemiology
DNA fingerprint
What is the probability that the offspring of a cross between a homozygous recessive parent & heterozygous parent will be homozygous recessive?
1/1
1/2
1/4
1/8
If a pea plant were homozugous recessive for height, what would be the alleles represented?
tt
Tt
tT
TT
What is the phenotypic ratio of a monohybrid cross between heterozygous parents?
1:2:1
3:1
9:3:3:1
1:2:2:1
What us the name for a cross that examines the inheritance of 2 traits?
monohybrid
codominance
incomplete dominance
dihybrid
In humans, freckles are dominant (F) & no freckles (f). How many in the punnett square shows a child who does not have freckles?
1
2
3
4
a diploid cell would have ____ of each chromosome and a haploid cell would have ____ of each chromosome.
two copies; one copy
one copy; two copies
one copy; one copy
two copies; two copies
what is the probability that the result of the offspring would be wild combs.
rrpp x RRPP. Wild combs are a recessive homozygous trait.
0%
25%
50%
100%
If w is recessive and W is dominant what would be the genotype for generation II number 3?
ww
Ww
WW
ww
