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Meiosis And Genetics
Test Description: General review of meiosis and genetics
Instructions: Answer all questions to get your test result.
1) Two chromosomes in a nucleus that carry genes for the same traits, but can specify different versions of the same traits, are called
A
homologous chromosomes
B
homologous chromatids
C
sister chromosomes
D
sister chromatids
2) A normal female has the genotype
A
XX
B
Y
C
X
D
XY
3) In a cell with a diploid number of 10 chromosomes, meiosis results in the formation of haploid daughter cells each with __ chromosomes.
A
5
B
10
C
20
D
40
4) ___ initiates the diploid stage of the human life cycle.
A
Mitosis
B
Fertilization
C
The specialization of cells
D
Meiosis
5) In humans the ___ determines the sex of the baby because ___.
A
female...an X chromosme will penetrate a female egg or a Y chromosome will penetrate a male egg
B
male...either an X or Y gamete will fertilize the egg
C
male...either an X chromosme will penetrate a female egg or a Y chromosome will penetrate a male egg
D
female...either an X or Y gamete will fertilize the egg
6) Different visible traits (blue eyes, straight hair, etc) is called
A
a karyotype.
B
a genotype.
C
a phenotype.
D
an allele.
7) The letters used to designalte the trait (ex: AA or Aa) is called a
A
punnett square.
B
genotype.
C
phenotype.
D
karyotype.
8) Different forms of the same trait (blond hair or brown hair) in homologous chromososmes is called
A
a phenotype.
B
an allele.
C
a karyotype.
D
a genotype.
9) The offspring of different varieties are referred to as
A
the F1 generation.
B
homozygous.
C
the F 2 generation.
D
a hybrid.
10) In a testcross, the organism with the unknown genotype is
A
crossed with a heterozygous individual.
B
always crossed with a homozygous recessive individual.
C
always crossed with anthor individual of unknown genotype.
D
crossed with the wild-type individual.
*select an answer for all questions
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