1. In humans, the autosomal gene allowing us to see the color blue (symbolized as B)...

1. In humans, the autosomal gene allowing us to see the color blue (symbolized as B) is dominant over a
different version of the same gene (b) which causes us to be color blind for this color. A person with
normal vision will have the genotype
A) Bb
B) BB or bb
C) BB
D) BB or Bb
E) bb

2. Which of these cells can do meiosis in animals?
A) germ line cells
B) somatic cells
C) diploid cells
D) B and C above
E) A, B, and C above

3. The flowering plants (tulips, trees, grass, etc.) that you easily see are
A) examples of sporophytes
B) either gametophytes or sporophytes
C) examples of gametophytes
D) asexually reproducing organisms
E) A and D

4. Which BEST describes an allele of a gene?
A) they are recessive forms of a gene
B) they are dominant forms of a gene
C) they are a mutation of a genes
D) they are “wildtype” varieties of genes
E) they are the different versions of a gene found in populations

5. The starting generation of a series of crosses is called the generation.
A) A
B) P
C) F1
D) F2
E) H

Expert Solution

Q 1. ANSWER: Dominant allele can express both in homozygous and heterozygous condition. So

The answer is D. BB or Bb

Q 2. ANSWER: somatic cells undergo mitosis and proliferate. Diploid cells of germ cells can undergo meiosis to produce gametes but generally they can also perform mitosis.Germline cells can undergo meiosis to produce germ cells. So the option

E. A, B and C can perform meiosis

Q 3. ANSWER: Flower which we can see easily in plants are examples of sporophyte. Actual gametophyte in these plants are ovules inside the ovary of flower.

So the option A is correct

Q 4. ANSWER: An allele is defined as different forms of gene that expresses same character. Example for phenotype of height of a plant two alleles are Tall as dominant and dwarf as recesive .

So the option E is correct.

Q 5. ANSWER: first generation of offsprings produced after first cross is called F1 generation.

So the option C is correct

gladiator answered 1 year ago

In humans, hypercholesterolemia is a dominant autosomal disorder. Color-blindness is a recessive disorder carried on the...

In humans, hypercholesterolemia is a dominant autosomal disorder. Color-blindness is a recessive disorder carried on the X-chromosome. A woman with normal vision who does not have hypercholesterolemia takes her daughter to a doctor for an examination. In the course of the examination, the doctor discovers that the girl is color-blind and has hypercholesterolemia. What does the doctor automatically know about the genotype and phenotype of the girl’s father?

In humans, brown eye color (B) is dominant over blue (b) while right-handedness (R) is dominant...

In humans, brown eye color (B) is dominant over blue (b) while right-handedness (R) is dominant over left-handedness (r). A brown-eyed, right-handed man marries a blue-eyed, right-handed woman. Their first child is blue-eyed and left-handed. List the genotypes of the parents.

Retinitis pigmentosa, a form of blindness in humans, may be caused by a dominant autosomal gene,...

Retinitis pigmentosa, a form of blindness in humans, may be caused by a dominant autosomal gene, R, or a recessive autosomal gene, a. Thus only A_ rr individuals have normal sight. An afflicted man whose parents are both normal marries a woman of genotype AaRr. (A) What is the genotype of the afflicted man? (B) What proportion of the children are expected to suffer from this affliction if R and A map to different chromosomes?

Here is a data set on bird populations with color variation. The Y gene is autosomal...

Here is a data set on bird populations with color variation. The Y gene is autosomal with a Y allele (yellow plumage) and y allele (brown plumage), where Y is dominant to y (Y > y). The survey shows phenotypic frequencies for a large mainland population on the coast of Ecuador and a small island population. The island population was founded in 1960 by a small flock of birds. Thereafter, there has been some gene flow between the mainland and...

In mice the allele for blue coat color (B) pink coat color (b). The allele for...

In mice the allele for blue coat color (B) pink coat color (b). The allele for long tail (T) is dominant of the allele for short tail (t). 1) If alleles of the two genes Assort Independently, what types of gametes will BbTt mice produce? What is the expected frequency of each gamete among all gametes produced?

4. In humans, red-green color blindness is recessive to normal sight. The gene for this trait is...

4. In humans, red-green color blindness is recessive to normal sight. The gene for this trait is carried on the X chromosome. In each of the following, give the genotype and phenotype of all possible offspring and their expected ratios. Give the phenotypic ratios of males ♂ and females ♀ separately (ALWAYS FOR X-LINKAGE): (a) a color-blind man married to a normal- sighted woman whose father is color-blind; (b) a man with normal color vision married to a color-blind woman.

Why does a swimmer under water see the color of seawater as greenish blue?

In Labrador retrievers, there are 3 gene products involved in determining coat color: gene product B, gene...

In Labrador retrievers, there are 3 gene products involved in determining coat color: gene product B, gene product E, and gene product C. B produces a melanin pigment such that B/B and B/b will produce a black lab while b/b (with less melanin produced) will result in a chocolate lab. However, for the B gene to be expressed, a signaling hormone (gene E product) must be produced to activate transcription of the B gene. E is fully dominant to e (loss of function mutation). In...

In humans, the allele for brown eyes (B) is dominant. The allele for blue eyes (b)...

In humans, the allele for brown eyes (B) is dominant. The allele for blue eyes (b) is recessive. If a woman with genotype Bb and a man with genotype Bb have a child, what will be the likelihood of the child having blue eyes? a 0% b 75% c 50% d 25% e 100% ------------------------------ What would be the result of a cell that underwent mitosis but not cytokinesis? a Two daughter cells with no nucleus b One daughter cell...

In rats, gene B produces black coat color if the genotype is B-, but black pigment...

In rats, gene B produces black coat color if the genotype is B-, but black pigment is not produced if the genotype is bb. At an independent locus, gene D produces yellow pigment if the genotype is D-, but no pigment is produced when the genotype is dd. Production of both pigments results in brown coat color. If neither pigment is produced, coat color is cream. A third independently assorting gene involved in determination of coat color in rats is...

Question