Genetics Test 1 Review Guide
Authored by Leslie Smith
Science
7th Grade
NGSS covered
Used 66+ times
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49 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
1. Heredity is __________________
an organism’s genetic make-up of allele frequency.
the scientific study of genetics.
the genetic material that carries information about an organism.
the passing of traits from parent to offspring through DNA.
Answer explanation
Check your Genetics notes in your notebook or your vocabulary flash cards for the definition.
Tags
NGSS.HS-LS3-1
NGSS.HS-LS3-2
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
2. Where are an organism’s chromosomes located?
on the genes
on the alleles
in the cell membrane
in the nucleus
Answer explanation
DNA is located in the nucleus of the cell, and chromosomes are made of DNA.
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
3. Which of the following BEST describes the number of chromosomes in a normal human liver cell?
23 pairs of chromosomes
46 different types of chromosomes
46 male chromosomes and 46 female chromosomes
23 original chromosomes and 23 duplicated chromosomes
Answer explanation
Normal body cells each have 46 chromosomes; 23 from each parent.
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
4. In certain breeds of dogs, deafness is due to a recessive allele (d) of a particular gene, and normal hearing is due to its dominant allele (D). What percentage of the offspring of a normal heterozygous (Dd) dog and a deaf dog (dd) would be expected to have normal hearing?
0%
50%
25%
100%
Answer explanation
You may have wanted to create a Punnett square to help you with this answer. Any genotype with even one dominant allele will mask, or cover up, the recessive allele. So, half of the potential genotypes are Dd (heterozygous) and therefore the probability of a hearing/normal dog is 50%,or half.
Tags
NGSS.HS-LS3-1
NGSS.HS-LS3-2
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
5. Hh
A - Genotype
B - Phenotype
Answer explanation
Hh is the genetic makeup that will determine the phenotype.
Tags
NGSS.HS-LS3-1
NGSS.HS-LS3-2
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
6. Blue Eyes
A - Genotype
B - Phenotype
Answer explanation
Phenoype = physical features
Tags
NGSS.HS-LS3-1
NGSS.HS-LS3-2
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
7. RR
A - Genotype
B - Phenotype
Answer explanation
Homozygous dominant genotype that will determine t phenotype (physical features)
Tags
NGSS.HS-LS3-1
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