In what phases is the genetic material in the cell correctly referred to as chro
ID: 93189 • Letter: I
Question
In what phases is the genetic material in the cell correctly referred to as chromatids?
A.
metaphase and telophase
B.
anaphase and metaphase
C.
interphase and telophase
D.
interphase and prophase
E.
metaphase and prophase
Consider two traits for an organism, determined by two genes, each of which is governed by at least two alleles. In the case of a dihybrid individual, the gametes formed will be of either the parental type or the recombinant type. Recombinant type gametes are formed because of
A.
the principle of dihybrids.
B.
multiple alleles.
C.
heterozygosity.
D.
incomplete dominance.
E.
independent assortment.
An allele is
A.
an alternate form of a gene.
B.
always recessive.
C.
the main factor determining a trait.
D.
always one of a pair.
E.
the dominant form of a gene.
After the DNA is replicated, and it condenses in prophase, two identical rods of DNA are seen. These are
A.
spindle fibers.
B.
kinetochores.
C.
chromatids.
D.
chromatin.
E.
centromeres.
Special cells found in the gonads that give rise to gametes upon division are called
A.
egg cells.
B.
somatic cells.
C.
germ cells.
D.
stem cells.
E.
basal cells.
A.
metaphase and telophase
B.
anaphase and metaphase
C.
interphase and telophase
D.
interphase and prophase
E.
metaphase and prophase
Explanation / Answer
1. E. Metaphase and prophase
During prophase and metaphase chromosome exists in its duplicated state called chromatids. In human there are 46 number of chromosomes but 92 number of chromatids during these two stages.
2. E. Independent assortment
This principle states that alleles for a trait separate when gametes are formed.
3. A. An alternate form of a gene
For each variation of trait of an organism an allele is an alternate form of a gene.
4. C.chromatids
A chromosome consist of two sister chromatids. It is at its duplicated state during the prophase of mitosis.
5. C. Germ cells
It is a biological cell that contains half the number of chromosomes of a somatic cell and able to give rise gametes of an organism that can reproduce sexually.
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