WorksheetsDIA 6 Review
Total questions: 21
Worksheet time: 11mins
What is the genotype of the yellow offspring?
Aa
aa
AA
aA
In a certain type of flower, purple (P) is dominant to white (p). Two flowers are crossed. Among the offspring, 75% are purple and 25% are white. What are the most likely genotypes of the parents?
Pp and Pp
PP and pp
Pp and pp
PP and PP
Pea plants can have either smooth peas or wrinkled peas. A cross of two smooth pea plants produces two smooth peas and two wrinkled peas. If the smooth pea is dominant, which of the following best describes the offspring of cross?
75% are homozygous dominant, 25% heterozygous, and 0% are homozygous recessive
50% are homozygous dominant, 25% heterozygous, and 25% are homozygous recessive
25% are homozygous dominant, 50% heterozygous, and 25% are homozygous recessive
0% are homozygous dominant, 50% heterozygous, and 50% are homozygous recessive
What is a polygenic trait?
traits produced by many parents
traits produced by more than one pair of genes
traits that result in one phenotype
traits that are controlled by the recessive gene
If the parent's genotypes are TtSs x TtSs, what are the possible genotypes of their offspring? (Hint: Use the FOIL method)
Tt, Ts, Ss, Ss
TS, tS, Ts, ts
TS, TS, ts, ts
TT, tt, SS, ss
In a certain breed of cow, the trait for coat color has two different versions, red or white. When a red cow (RR) is crossed with a white cow (WW), their offspring express a speckled roan coat, with both red and white coloring.
Which types of traits are most likely responsible for producing the offspring’s pattern?
codominance
incomplete dominance
sex-linked trait
polygenic traits
The following pedigree shows a family with Duchenne Muscular Dystrophy (DMD). Which individual could be homozygous dominant?
Jack
Joe
Jeremy
Jessica
If Jacob and Jessica were to have another child, what could be the child's possible genotypes?
JJ, Jj, or jj
JJ or Jj only
jj only
JJ or jj only
Colorblindness is a sex-linked, recessive trait. Which of the following describes the probability of colorblindness in the offspring of a normal-vision man and a normal-vision woman whose father was colorblind?
None of their daughters will have colorblindness.
Both of their sons will be colorblind.
Their sons have a 25% chance of being colorblind
There is a 50% chance their daughters will be colorblind.
The genes for hair color and eye color are located on different chromosomes. A brunette, brown-eyed woman has 3 children with a blonde, blue-eyed man. Two of their children have brunette hair and brown eyes, but their youngest child has blue eyes and brown hair. Which of the following explains the different phenotypes in the offspring?
law of dominance
law of segregation
law of independent assortment
law of incomplete dominance
A rabbit that is heterozygous for brown fur produces a white offspring. What law explains why this occurs?
law of recessivity
law of dominance
law of independent assortment
law of segregation
What is a positive aspect of genetically modified crops (GMOs)?
Resistance to insect damage
increase biodiversity
decrease tolerance to herbicides
increase labor needs
What is a negative impact of genetically modified organisms?
increase the need for pesticides
decreased genetic diversity
decreased viral resistance
limited food supply
Meiosis is a special form of cell division in which each daughter cell receives half the amount of DNA as the parent cell. How does this relate to the inheritance of alleles?
a sex cell may be inherited from one or both parents
two sex cells are inherited from each parent
both sex cells are inherited from only one parent
one sex cell is inherited from each parent
Which of the following could be used to test for independent assortment?
An experiment looking to see if two different traits are inherited together or individually
An experiment looking to see if a parent's alleles are separated during meiosis
An experiment looking to see if one allele masks the other allel
An experiment looking to see if certain traits are found only in certain populations
What is the pattern of inheritance seen in the following pedigree?
codominance
sex-linked dominant
autosomal recessive
sex-linked recessive
Shown is a pedigree for Duchenne Muscular Dystrophy (DMD), a sex linked recessive disorder. Who in this pedigree could be a carrier for DMD?
Jack
Jill
James
Jessica
What is the phenotypic ratio of an autosomal dominant heterozygous dihybrid cross?
9:6:1
3:1
9:3:3:1
1:2:1
Why are karyotypes useful?
they can provide a cure for chromosomal disorders
They can help doctors determine if any chromosomes are missing or damaged
They can determine if certain chromosomes can be added or deleted
They can make gene therapy an obsolete treatment plan
Familial hypocholesteremia (FH) is a life threatening condition that causes a high amount of low density lipoproteins (LDL) or "bad cholesterol".
Homozygous dominant individuals produce low amounts of LDL. Homozygous recessive individuals produce high amounts of LDL. Heterozygous individuals produce half the amount of LDL.
What is the pattern of inheritance for FH?
incomplete dominance
codominance
recessive
autosomal dominance
In human blood types, a person with type A blood has A surface proteins. A person with type B blood has B surface proteins. A person with type AB blood has both A and B surface proteins.
What is the pattern of inheritance?
autosomal dominance
incomplete dominance
codominance
sex-linked dominance
