A common name for MZ twins is: identical twins fraternal twins conjoined twins c
ID: 267921 • Letter: A
Question
A common name for MZ twins is:
identical twins
fraternal twins
conjoined twins
concordant twins
twins
A common name for DZ twins is:
identical twins
fraternal twins
conjoined twins
cloned
twins
MZ twins have higher ______ due to the same genotypes and because they are usually brought up in the same _____.
correlation coefficients; environment
expessivities; environment
penetrance rates; environment
concordance rates; environment
twins
A key factor in "turning off" a gene is with the process of adding a (CH3) group. This process is called:
Acetylation
Methylation
Histone de-acetylation
Histone deactivation
epigenetics
How does polyploidy differ from aneuploidy?
Polyploidy involves diploid chromosome sets, while aneuploidy involves haploid sets.
Polyploidy involves multiples of haploid set greater than 2n, aneuploidy involves less than a diploid set of chromosomes.
Polyploidy involves monosomy, aneuploidy involves trisomy.
Polyploidy is produced by translocations, aneuploidy by nondisjunction.
Chromosome abnormalities
The two most common types of polyploidy in humans are:
trisomy and aneuploidy
triploidy and haploidy
triploidy and tetraploidy
tetraploidy and diploidy
Chromosome abnormalities
In dosage compensation, females have the same amount of X-linked gene products as males. This is brought about by:
loss of one X chromosome from all somatic cell in females
accelerated production by genes on the Y chromosome
lowered rate of synthesis by genes on the X chromosome
inactivation of one X chromosome in all somatic cells of females
Gender differences
It would be possible for a Klinefelter (XXY) cat to have tortoise shell color.
True
False
Dosage compensation
The nitrogen base most vulnerable to mutation is:
Adenine
Cytosine
Thymine
Guanine
Gene mutations
Abnormal chromosome numbers generally signified as 2N-1 or 2N+1 are referred to as:
Diploid
Haploid
Polyploid
Aneuploid
cance and chromosomes
Humans have ______ DIFFERENT kinds of chromosomes.
24
23
46
48
chromosome analysis
A chromosome content of 2N-1 is called:
trisomy
monosomy
disomy
tetrasomy
chromosome amounts
Triplo-X (XXX syndrome), causes little change in phenotype due to the formation of:
Barr bodies
tetrads
homologues
nucleosomes
nondisjunctive disorders
Explanation / Answer
As these are multiple questions, have marked the answer in green and made it bold.
a. identical twins
b. fraternal twins
c. conjoined twins
d. concordant twins
a. identical twins
b. fraternal twins
c. conjoined twins
d. cloned
a. correlation coefficients; environment
b. expessivities; environment
c. penetrance rates; environment
d. concordance rates; environment
a. Acetylation
b. Methylation
c. Histone de-acetylation
d. Histone deactivation
5. How does polyploidy differ from aneuploidy?
a. Polyploidy involves diploid chromosome sets, while aneuploidy involves haploid sets.
b. Polyploidy involves multiples of haploid set greater than 2n, aneuploidy involves less than a diploid set of chromosomes.
c. Polyploidy involves monosomy, aneuploidy involves trisomy.
d. Polyploidy is produced by translocations, aneuploidy by nondisjunction.
6. The two most common types of polyploidy in humans are:
a. trisomy and aneuploidy
b. triploidy and haploidy
c. triploidy and tetraploidy
d. tetraploidy and diploidy
7. In dosage compensation, females have the same amount of X-linked gene products as males. This is brought about by:
a. loss of one X chromosome from all somatic cell in females
b. accelerated production by genes on the Y chromosome
c. lowered rate of synthesis by genes on the X chromosome
d. inactivation of one X chromosome in all somatic cells of females
8. It would be possible for a Klinefelter (XXY) cat to have tortoise shell color.
a. True
b. False
9. The nitrogen base most vulnerable to mutation is:
a. Adenine
b. Cytosine
c. Thymine
d. Guanine
10. Abnormal chromosome numbers generally signified as 2N-1 or 2N+1 are referred to as:
b. Haploid
c. Polyploid
d. Aneuploid
11. Humans have ______ DIFFERENT kinds of chromosomes.
a. 24
b. 23
c. 46
d. 48
12. A chromosome content of 2N-1 is called:
a. trisomy
b. monosomy
c. disomy
d. tetrasomy
13. Triplo-X (XXX syndrome), causes little change in phenotype due to the formation of:
a. Barr bodies
b. tetrads
c. homologues
d. nucleosomes
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