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Genetics
Test Description: 21-30
Instructions: Answer all questions to get your test result.
1) The genetic make up of an organism is called
A
Punnet square
B
dihybrid
C
genotype
D
phenotype
2) What is an allele?
A
A sperm cell
B
A form of sexual reproduction
C
An egg cell
D
A variation of a gene
3) In humans, a male has
A
two X chromosomes
B
one X chromosome only.
C
one X chromosome and one Y chromosome
D
two Y chromosome
4) Human female produce egg cells that have
A
one X chromosome
B
one X or one Y chromosome
C
one X and one Y chromosome
D
two X chromosomes
5) Most sex-linked genes are located on
A
the X chromosome only
B
both the X chromosome and the Y chromosome
C
the autosomes
D
the Y chromosome only
6) Colorblindness is more common in males than female because
A
the allele for colorblindness is located on the Y Chromosome
B
males who are colorblind have two copies of the allele for colorblindness
C
the allele for colorblindness is recessive and located on the X chromosome
D
father pass the allele for colorblindness to their sons only
7) which of these disorders is recessive?
A
Cystic Fibrosis
B
Huntingtons Disease
C
Dwarfism
8) Gametesmust be haploid because
A
fertilization results with a haploid zygote
B
two gametes will unite during fertilization to create a diploid cell
C
the gametes' chromosomes will be replicated prior to cell division
D
gametes are small and can hold only the haploid number of chromosomes
9) Why does sexual reproduction result in greater diversity among offspring than does asexual reproduction?
A
sexual reproduction may occur at a faster rate
B
New combinations of genes result from sexual reproduction
C
Mutations aremore likely to occur in asexual reproduction
D
Only mitosis must occur in sexual reproduction
10) During DNA replication, the wrong nucleotide was inserted in the DNA sequence. Which of the following terms describes this situation?
A
Transcription
B
Translation
C
Mutation
D
Regeneration
*select an answer for all questions
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