A homozygous dominant germ cell undergoes meiosis. The gametes will _________________________.
- only have the dominant allele
- have both the dominant or the recessive allele
- only have the recessive allele
- either have the dominant or the recessive allele
The next two questions are based on the following information.
Part 1 of 2: In beans yellow (Y) is dominant to green (y) and smooth (S) is dominant to wrinkled (s). What are the possible genotypes for the offspring of the following cross: YySS and YYSs.
- YYSS, YySS, YYSs, YySs
- YS, yS, YS, yS
- Yy, SS, YY, Ss
- YYSS, YYss, yySS, yyss
Part 2 of 2: In beans with yellow (Y) dominant to green (y) and smooth (S) dominant to wrinkled (s): What are the phenotypes for the offspring in the example in the previous question?
- 50% yellow smooth and 50% green smooth
- 100% green wrinkled
- 50% yellow smooth and 50% yellow wrinkled
- 100% yellow smooth
In peas, purple is dominant over white for flower color. Suppose a purple flower is crossed with a white flower. Some of the offspring are purple, and others are white. What is the genotype of the original purple flower?
- either PP or Pp
Peter gets his blood tested and finds out that he is B+. This test identified a
Linked genes: _______________________________.
- have related phenotypes
- are found on the same chromosome
- are alleles of each other
- sort independently of each other
The sister chromatids separate during which stage of meiosis?
- Anaphase I
- Anaphase II
- Prophase I
- Prophase II
Alleles are different versions of a _______________.
An individual that expresses the dominant trait of a dominant/recessive gene
- must be homozygous
- must be heterozygous
- can be either homozygous or heterozygous
Which relationship is correct?
- Protein is to phenotype as genotype is to DNA.
- Protein is to genotype as DNA is to phenotype.
- Phenotype is to protein as DNA is to genotype.
- Protein is to phenotype as DNA is to genotype.
The next three questions are based on the following information.
In humans, the ability to roll the tongue (T) is dominant over the inability to do so (t). Suppose Mike, who can roll his tongue, and Jeannie, who cannot roll her tongue, have a child, Benjamin.
Part 1 of 3: If Mike’s mother was able to roll her tongue but his father was not able to roll his, then what is the probability that Benjamin will be able to roll his tongue?
Part 2 of 3: What is the probability that Benjamin will be homozygous recessive?
Part 3 of 3: What is the probability that Benjamin will be homozygous dominant?
Which of the following is true of a diploid organism?
- It has two of each gene.
- It has two of each chromosome.
- It has two alleles of each gene.
- All of the above.
- None of the above.
Homozygous is a term that can describe a(n) _____________.
List all possible gametes that can be produced from a cell that has the following genotype: AaBBDd.
- ABD, abd
- ABD, ABd, AbD, Abd, aBD, aBd, abD, abd
- A, a, B, D, d
- ABD, ABd, aBD, aBd
Homologous pairs of chromosomes line up at the center of the cell in during which stage of meiosis?
- Metaphase I
- Metaphase II
- Telophase I
- Telophase II
Two heterozygous individuals have mated. How many different genotypes can be present in the offspring?
How many different gametes are produced by a cell with the genotype AABb?
How many copies of each gene does a diploid organism have?
Which of these discusses genotypes rather than phenotypes?
- The offspring of these flowers can be either red or white.
- The male mouse is homozygous dominant.
- Lactose intolerance can be due to a missing protein (the enzyme that digests lactose).
- All of these discuss genotypes
Crossing over occurs: _______________.
- during meiosis I only
- during meiosis II only
- during both meiosis I and meiosis II
- during mitosis but not meiosis
Genotypes provide information about