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Mendelian Genetics & Heredity
Practice Test Questions II
from Science Prof Online
Genetics & Heredity Sample Test Qus - Part 2
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2. All the offspring from a white hen and a black rooster are grey. The simplest explanation for this pattern of inheritance is...
a. complete dominance
b. codominance
c. incomplete dominance
d. sex linkage
3. In a diploid organism, most genes come in alternative forms called _____________. An individual with two identical versions of a gene is said to be _______________, while an individual with two different versions of a gene is said to be _______________.
a. alleles, heterozygous, homozygous
b. genomes, normal, a mutant
c. alleles, homozygous, heterozygous
d. alleles, diploid, haploid
e. diploids, homologue, heterologue
1. Whether an allele is dominant or recessive depends on ...
a. how common the allele is relative to other alleles.
b. whether it is inherited from the mother or the father.
c. whether it or another allele determines the phenotype when both are present.
d. whether or not it is linked to other genes.
The following questions, from the Virtual Biology Classroom, are designed to help students better understand this topic. All questions are based on material that can be found on the Mendelian Genetics & Heredity Lecture Main Page.
Free review questions to help students better understand
Genetics & Heredity.
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6. A man with type B blood and a woman with type A blood could have a children of which of the following phenotypes?
a. A, B, or O b. AB only c. AB or O
d. A, B, AB or O
7. In a situation of incomplete dominance, if I cross a red snapdragon and a white snapdragon, what will be the phenotype of their offspring?
a. All red
b. RW
c. Some red, some white
d. All pink
8. In a case of complete dominance, a cross between two parents who are pure for a certain trait will result in offspring that are:
a.heterozygous
heterozygousb.homozygous
homozygousc.some homozygous some herterozygous
some homozygous some herterozygousd.incomplete dominance
incomplete dominancee. monozygous
monozygous4. The genetic makeup of an organism is its ________________, while the physical traits of an organism are called its_____________.
a. genotype, phenotype
b. homologue, heterologue
c. RNA, DNA
d. phenotype, genotype
e. genome, karyotype
5. Jeff was found to be heterozygous (Bb) for the bent little finger trait. The alleles represented by the letters B and b are...
a. on the X chromosome
b. linked
c. on homologous chromosomes
d. both present in each of Jeff's sperm cells
9. Mendel’s Law of Segregation indicates that:
q.A cross between parents pure for a certain trait will produce hybrids
A cross between parents pure for a certain trait will produce hybridsb.For genes that are not on the same chromosome, alleles assort independently of one another into gametes
For genes that are not on the same chromosome, alleles assort independently of one another into gametesc.Alleles of a gene are sorted into separate sex cells and then recombine with another allele at fertilization
Alleles of a gene are sorted into separate sex cells and then recombine with another allele at fertilization10. If I cross a pea plant that is homozygous dominant for tallness and one that is recessive for shortness, what will the genotype of the offspring be? (T and t represent the alleles for height in pea plants).
a. All will be tall b. TT c. Tt d. tt
Click here for more Mendelian Genetics & Heredity practice test questions.
6. A man with type B blood and a woman with type A blood could have a children of which of the following phenotypes?
a. A, B, or O b. AB only c. AB or O d. A, B, AB or O
7. In a situation of incomplete dominance, if I cross a red snapdragon and a white snapdragon, what will be the phenotype of their offspring?
a. All red
b. RW
c. Some red, some white
d. All pink
8. In a case of complete dominance, a cross between two parents who are pure for a certain trait will result in offspring that are:
a.heterozygous
heterozygousb.homozygous
homozygousc.some homozygous some herterozygous
some homozygous some herterozygousd.incomplete dominance
incomplete dominancee. monozygous
monozygous