Worksheets3.4 IB Inheritance
Total questions: 25
Worksheet time: 13mins
The genotype of this flower is....
homozygous recessive
heterozygous
homozygous dominant
white
To express a recessive trait you must be....
homozygous dominant
heterozygous
heterozygous recessive
homozygous recessive
The physical appearance of a trait is called.....
Genotype
Phenotype
Homozygous
Heterozygous
Mendel's law of segregation states that during meiosis, the alleles that control each trait separate, and only _________________ from each pair is/are passed to the offspring
one allele
the dominant trait
two alleles
the recessive trait
A roan cow shows co-dominance in fur color (red & white are both expressed). What is the phenotypic ratio expected if a roan cow and a roan steer mate together?
100% Roan
1:1 Red:White
1:1 Red:Roan
1:2:1 White:Roan:Red
1:1 White:Roan
Ken is blood type B and Sally is blood type A. How can they have children who are types A, B, AB, and O?
Ken: IBi
Sally: IAi
Ken: IBIB
Sally IAi
Ken: IBi
Sally: IAIA
Ken: IBIB
Sally: IAIA
Orange or black fur is a single, X-linked co-dominant trait in cats. Calico cats have white fur with patches of orange and black. Is it true that calico cats can only be female?
Yes, because they have 2 'X' chromosomes, and therefore can have both the orange and black alleles (XOXB)
No, males can be calico because they can have both the alleles for orange and black (XOYB)
Yes because the trait is found on the X chromosome (XOBX)
No, males can be calico because the trait is found on the X chromosome (XOBY)
Colorblindness is a recessive X-linked disorder.
Which genotype represents a male with normal vision?
XNYN
XnYn
XNY
XnY
Jim has type AB blood. His dad could be type O.
Colorblindness is more common in males than in females because......
fathers pass the allele for colorblindness to their sons only
the allele for colorblindness is located on the Y chromosome
the allele for colorblindness is recessive and located on the X chromosome
males who are colorblind have two copies of the allele for colorblindness
Bob is blood Type B and Hilda is Type A, their son Barry is Type O. What are the only possible genotypes of Bob and Hilda?
Bob: IBi
Hilda: IAi
Bob: IBi
Hilda: IAIA
Bob: IBIB
Hilda: IAi
Bob: IBIA
Hilda: IAi
Males are more likely to suffer from a sex-linked disease or disorder because...
males are the weaker sex
males have less DNA
males have 1 X chromosome, so the disorder is more likely to be expressed
females are the stronger sex
If a trait is more likely to appear in one sex over the other......
the trait is probably sex-linked.
the trait is probably autosomal.
the trait is probably co-dominant
the trait if probably incompletely dominant
If something is heterozygous, it is also...
purebred
hybrid
dominant
recessive
Which of Mendel's laws explains why a sibling will look different than another sibling but both will have a combination of the parents' various traits?
Law of Dominance
Law of Segregation
Law of Independent Assortment
Theory of Evolution
Why did Mendel study pea plants? (3)
Because he could control the mating between plants
Because they have easily identifiable traits
Because both self-pollination and cross-pollination is possible
Because they were the only plants to display Mendelian genetics
Because he was allergic to asparagus
A female was a carrier for sex-linked color blindness and her partner had normal vision. If they had 4 boys, what percentage of these male children would statistically also be color blind?
0%
25%
50%
100%
Which disease or disorder is caused by the inheritance of two mutated alleles?
Down Syndrome
Colorblindness
Cystic Fibrosis
Hemophilia
Which of the following statements is true regarding blood types?
A and O are codominant, B is recessive.
B and O are codominant, A is recessive.
A and B are codominant, O is recessive.
A , B and O are all codominant with each other.
In humans, hemophilia is an X-linked recessive trait. If a man and a woman have a son who is affected with hemophilia, which of the following is definitely true?
The mother carries an allele for hemophilia
The father carries an allele for hemophilia
The father is afflicted with hemophilia
both parents carry an allele for hemophilia
A man who has a sex-linked allele will pass it on to...
all his daughters
all his sons
1/2 of his daughters
1/2 of his sons
The observable outward manifestation of the genes of an individual is referred to as its....
genome
genotype
phenotype
proteome
Hemophilia is a recessive x-linked disorder.
Which genotype represents a female who is a carrier for hemophilia?
XHXh
XhXh
XHXH
XhY
Which of the following crosses could NOT produce a child with blood type A?
IAi x IBi
IA i x IAIB
IAIA x IBi
IAIA x IBIB
IAi x ii
The red and blue pair of chromosomes in the bottom row are....
genetically identical
carrying the same genes, but different alleles
carrying completely different genes
carrying the same genes and the same alleles
