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WorksheetsGenetics 1
Total questions: 24
Worksheet time: 30mins
Name
Class
Date
1.
What do you call a section of DNA that codes for a specific trait?
a)
nucleus
b)
chromosome
c)
gene
d)
DNA
2.
__________ worked with pea plants to prove that traits are passed from parent to offspring.
a)
Reginald Punnett
b)
Gregor Mendel
3.
An organism's genotype describes its __________.
a)
genetic makeup
b)
physical appearance
4.
A dominant trait shows up __________.
a)
only when two dominant alleles are present
b)
only when one dominant allele is present
c)
when at least one recessive allele is present
d)
when at least one dominant allele is present
5.
A recessive trait only shows up when __________.
a)
two dominant alleles are present
b)
one dominant allele is present
c)
two recessive alleles are present
d)
at least one dominant allele is present
6.
What word describes how traits are passed from parent to offspring?
a)
Alleles
b)
Dominance
c)
Probability
d)
Heredity
7.
Scientists use __________ to show what genotype combinations are possible.
a)
Punnett Square
b)
Mendel Square
c)
Madison Square
d)
Times Square
8.
------is the combination of two alleles that are different from one another.
a)
homozygous
b)
heterzygous
c)
phenotype
d)
trait
9.
----is the type of gene that always shows itself when present
a)
genotype
b)
homozygous
c)
phenotype
d)
dominant
10.
Black fur (B) is dominant. Find the probability of a black offspring in a cross: bb x bb.
a)
0%
b)
25%
c)
50%
d)
100%
11.
A type of gene that can be hidden is called
a)
genotype
b)
recessive
c)
dominant
d)
allele
12.
A section of the DNA strand that determines a specific trait
a)
gene
b)
trait
c)
chromosome
d)
allele
13.
What is NOT a possible offspring genotype?
a)
BB
b)
Bb
c)
bb
14.
What is the missing genotype?
a)
BB
b)
Bb
c)
bb
15.
The device used to predict genetic outcomes.
a)
Geneticist
b)
Fate
c)
Punnett Square
d)
Pedigree
16.
Purple flowers are dominant to white flowers.
What is the phenotype of the flower whose genotype is Pp
What is the phenotype of the flower whose genotype is Pp
a)
white
b)
purple
c)
lilac
d)
spotted
17.
Passing of traits from one generation to the next
a)
Heredity
b)
Genetics
c)
Inheritance
d)
Allele
18.
Scientific study of how traits are passed to offspring through genes
a)
Heredity
b)
Genetics
c)
Inheritance
d)
Allele
19.
Alternate form of a gene for a single trait; may be dominant or recessive
a)
Heredity
b)
Genetics
c)
Inheritance
d)
Allele
20.
one set of instructions for an inherited trait
a)
heredity
b)
allele
c)
trait
d)
gene
21.
A single piece of coiled DNA found in the cells; contains genes that encode traits.
a)
gene
b)
chromosome
c)
trait
d)
DNA
22.
Complex molecule that carries genetic information that defines an organism's traits. It is stored in the nucleus.
a)
DNA
b)
protein
c)
RNA
d)
glucose nucleic acid (GNA)
23.
Offspring receives two sets of _____________ (one from each parent)
a)
blue jeans
b)
genes
c)
machines
d)
pedigree
24.
If an organism has 2 different alleles for a trait, it is _______________.
a)
homozygous
b)
heterozygous
c)
diploid
d)
haploid
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