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WorksheetsGenetics/Heredity 7th Grade
Total questions: 35
Worksheet time: 23mins
Name
Class
Date
1.
Makes proteins using directions from DNA.
a)
ribosome
b)
nucleus
c)
ER
d)
golgi bodies
2.
The letters that represent the different forms of a gene.
a)
trait
b)
hetrozygous
c)
homozygous
d)
alleles
3.
Cell reproduction - when one body cell becomes two.
a)
mitosis
b)
meiosis
c)
fermentation
d)
lactic acid
4.
Produces four sex cells, sperm or egg, that are used to pass a paren't trait to offspring.
a)
Mitosis
b)
Meiosis
c)
Reproduction
d)
Fertilization
5.
The scientific study of heredity.
a)
Biology
b)
Gene Therapy
c)
Genetic Counseling
d)
Genetics
6.
The passing of physical characteristics from parent to offspring.
a)
Genetics
b)
Heredity
c)
Science
d)
Cloning
7.
The trait that hide in the background (lower case), can only be expressed in homozygous form (ex: hh)
a)
dominant
b)
recessive
c)
heterozygous
d)
carrier
8.
The trait that overshadows and is expressed (capital letter).
a)
dominant
b)
recessive
c)
heterozygous
d)
hybrid
9.
Two alleles/letters for one trait that are the same (Ex: DD or dd)
a)
Homozygous
b)
Heterzygous
c)
Carrier
d)
Pedigree
10.
Combination of alleles (letters): (ex: Dd)
a)
Homozygous
b)
Heterozygous
c)
Purebred
d)
Clone
11.
The physical appearance of a trait (Ex: dimples, no dimples)
a)
Genotype
b)
Phenotype
c)
Trait
d)
Quality
12.
Different combination of letters or alleles.
a)
Genotype
b)
Phenotype
c)
Trait
d)
Recessive
13.
Deoxyribonucleic acid.
a)
DrNA
b)
RNA
c)
DNA
d)
CIA
14.
Which of the following is a trait that you probably inherited?
a)
your taste in clothing
b)
your musical talent
c)
your athletic ability
d)
your hair color
15.
An organism whose genotype is Tt is considered a
a)
Purebred
b)
Pureblood
c)
Hybrid
d)
Kitty cat
16.
An organism with the genotype tt is considered a ______________.
a)
Purebred
b)
Hybrid
c)
Clone
d)
Pedigree
17.
The ____________ chromosome determines if a person is a male or female.
a)
multiple
b)
recessive
c)
sex
d)
gene
18.
Who determine the sex of the baby?
a)
Male
b)
Female
19.
Who were the three MAIN scientists who founded the structure/shape of DNA
a)
Watson, Crick, Mendel
b)
Chargaff, Franklin, Watson
c)
Franklin, Watson, Crick
d)
Dregne, Franklin, Crick
20.
DNA is shaped like which of the following:
a)
double helix
b)
spiral staircase
c)
twisted ladder
d)
all of the above
21.
According to Chargaff's rule in regards to DNA Adenine pair with ____________.
a)
Adenine
b)
Thymine
c)
Cytosine
d)
Guanine
22.
According to Chargaff's rule in regards to DNA Cytosine pair with ____________.
a)
Adenine
b)
Thymine
c)
Cytosine
d)
Guanine
23.
According to Chargaff's Rule, if a strand of DNA contains 20% cytosine what percentage thymine is in that strand?
a)
20%
b)
30%
c)
40%
d)
50%
24.
A genetic disorder in which a person’s blood clots very slowly if at all is called
a)
sickle-cell disease
b)
Down syndrome
c)
cystic fibrosis
d)
hemophilia
25.
People with an extra copy of chromosome 21 have a disorder called
a)
Down syndrome
b)
hemophilia
c)
colorblindness
d)
amniocentesis
26.
TRUE or FALSE. The crossing of two individuals that have identical or similar set of alleles is referred to as inbreeding
a)
TRUE
b)
FALSE
27.
The transfer of genes from one organism to another is called
a)
hybridization
b)
selective breeding
c)
cloning
d)
genetic engineering
28.
TRUE or FALSE. Cloning is similar to sexual reproduction
a)
TRUE
b)
FALSE
29.
Tongue rolling is dominant to no tongue rolling. Ava's mom is heterozygous for tongue rolling and his dad is homozygous dominant for the trait. What genotypes can result from the cross of Ava's parents?
a)
RR, rr
b)
RR, Rr
c)
RR, Rr, rr
d)
all Rr
30.
In a certain species of cats, a black nose is dominant over a pink nose. If my cat Coconut is homozygous for a pink nose and hw mates with a purebred dominant female, what is the ratio of black to pink noses?
a)
all black (4:0)
b)
2 black: 2 pink
c)
1 black :3 pink
d)
3 black : 1 pink
31.
_________________________ is a procedure in which the fluid from around a developing baby is removed to test for genetic disorders.
a)
hybridization
b)
Amniocentesis
c)
gene therapy
d)
clone
32.
In _________________________, breeders cross two genetically different individuals.
a)
hybridization
b)
Amniocentesis
c)
gene therapy
d)
clone
33.
A(n)______________________ is an organism that is genetically identical to the organism from which it was produced.
a)
hybridization
b)
Amniocentesis
c)
gene therapy
d)
clone
34.
Inserting working copies of a gene directly into the cells of a person with a genetic disorder is referred to as _______________________.
a)
hybridization
b)
Amniocentesis
c)
gene therapy
d)
clone
35.
Contains DNA and controls cell activities.
a)
ribosome
b)
nucleus
c)
RNA
d)
vacuole
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