Worksheets7th Grade Ch 5 - Genetics - Lesson 2 - Understanding Inheritance
Total questions: 25
Worksheet time: 16mins
1. A Punnett square shows you all the ways in which ___________________ can combine.
alleles
eggs
sperm
colors
Blood type in humans is controlled by ______________ alleles.
one
two
three
four
In a Punnett square, a capital letter stands for a _____________ allele.
recessive
dominant
heterozygous
homozygous
Of the following, which is NOT a human blood phenotype?
O
AB
B
C
Of the following, which represents a homozygous recessive genotype?
TT
tt
Tt
TTT
Which of the following is NOT an example of a complex pattern of inheritance?
incomplete dominance
multiple alleles
Punnett Square
polygenic inheritance
What type of inheritance determines eye color?
incomplete dominance
codominance
multiple alleles
polygenic inheritance
Which of the following is an example of multiple alleles?
coat with red and white hairs
blood type
pink flower
human height
In this cross between two pea plants, the offspring are
100% smooth.
50% smooth and 50% wrinkled.
75% wrinkled and 25% smooth.
75% smooth and 25% wrinkled.
A heterozygous orange-flowered plant is crossed with a homozygous purple-flowered plant. If orange is a dominant allele and purple is recessive, what color ratio will the flowers of the offspring plants have?
1 purple: 3 orange
4 purple: 0 orange
2 purple: 2 orange
0 purple: 4 orange
A man and a woman want to have a child, but the man is heterozygous (Cc) for a recessive trait that causes a fatal illness. What is the probability of a child’s inheriting the trait?
0%
25%
50%
75%
A and B are the same kind of fish. A has a genotype for narrow fins (ww), and B has a genotype for wide fins (W-). Which of the following genotypes of parent fish will produce only offspring having wide fins?
Ww and Ww
WW and ww
Ww and ww
ww and ww
Bird A has the genotype ll for bill length, and Bird B is LL. The bills of their offspring would be:
long in 100% of the offspring.
short in 100% of the offspring.
long in 50% of the offspring.
short in 75% of the offspring.
Some ____________________ are due to environmental influences.
phenotypes
pedigrees
Punnett squares
offspring
Different forms of a gene are called ___________________________.
alleles
jeans
flowers
homozygous
A ____________________ square is a model that helps make genetic predictions.
Punnett
Pedigree
Podigree
Pungent
A(n) ____________________ is a visual tool for following a trait through generations of a family.
Punnett Square
Pedigree
Mobius strip
Applet
Identify three environmental factors that can affect an organism’s phenotype.
soil acidity or alkalinity, lifestyle choices, temperature
rain, power outage, temperature
lifestyle choices, memory, brain cells
parents, siblings, neighbors
A yellow pea plant (Yy) and a green pea plant (yy) could produce ____________________ green offspring.
1
2
3
4
Organisms with two different alleles for a trait are called _____________.
heterozygous
homozygous
heritage
complacent
When an intermediate form (mixed) is expressed in offspring
incomplete dominance
co-dominance
random dominance
legal dominance
When more than two alleles control a trait, it is called ________________.
co-dominance
multiple alleles
incomplete dominance
genes
The physical appearance of an organism is its
genotype
phenotype
blood type
mental type
A tool for tracing a trait through a family is called a ____________________.
Punnett square
pedigree
postural meaning
pretend genetics
Name at least three traits that are a result of polygenic inheritance.
human height, human eye color, human skin color,
human age, human fingers, human spaces
human height, human status, human humor
this answer is not the answer
