In humans, the allele for black hair (B) is dominant to the allele to brown hair...

Question

Question

In humans, the allele for black hair (B) is dominant to the allele to brown hair (b), and the allele for curly hair (C) is dominant to the allele for straight hair (c). When a person of unknown genotype is crossed against a straight- and brown-haired individual, the phenotypic 2. ratio is 25% curly black hair 25% straight black hair 25% curly brown hair 25% straight brown hai What is the genotype of the unknown parent? (A) BBCO (B) BbCC (C) bbCc (D) BbCo

Add a comment Improve this question Transcribed image text

Answer 1

Answer #1

As per the question, Straight and brown hair is recessive charecter. So it can denominate as bbcc.

when straight and brown haired individual (bbcc) crossed with curley and black haired individual (BbCc), the phenotypic ratio will be;

25% curley black hair (BbCc)

25% staight black hair (Bbcc)

25% curley brown hair (bbCc)

25% straight brown hair (bbcc)

How it means, From bbcc will get four charecters bc, bc, bc and bc.

From BbCc will get four charecters of BC, Bc, bC, and bc.

when it crosses,

	BC	Bc	bC	bc
bc	BbCc	Bbcc	bbCc	bbcc
bc	BbCc	Bbcc	bbCc	bbcc
bc	BbCc	Bbcc	bbCc	bbcc
bc	BbCc	Bbcc	bbCc	bbcc

Add a comment

Answer 2

Similar Homework Help Questions

1. A monogenic trait (hair color) is controlled by the B locus with dominant B (brown)...

1. A monogenic trait (hair color) is controlled by the B locus with dominant B (brown) and recessive b (red) alleles. Another monogenic trait (hair texture) is controlled by the C locus with dominant C (curly hair) and recessive c (straight hair). a) What are the possible classes of genotypes with these two loci? b) What are the possible genotypes with these two loci? c) What are the possible genotype(s) of a person with brown hair? d) What are the...
A colorblind woman marries a man who is not colorblind. What is the phenotypic ratio of...

A colorblind woman marries a man who is not colorblind. What is the phenotypic ratio of the offspring? In humans, freckles are dominant over absence of freckles, and curly hair is incompletely dominant with straight hair. A freckled, wavy-haired woman has kids with a freckled straight-haired man. Both the man and woman have one homozygous dominant parent and one homozygous recessive parent for freckles. What is the phenotypic ratio of the man and woman’s kids? Pigment in the mouse is...
In mice, black fur (B) is dominant over brown fur (b). Breeding a brown mouse and...

In mice, black fur (B) is dominant over brown fur (b). Breeding a brown mouse and a homozygous black mouse produces all black offspring. a. What is the genotype of the gametes produced by the brown-furred parent? ________________________________________________________ b. What is the genotype of the brown-furred parent? ________________________________________________________ c. What is the genotype of the black furred parent? ________________________________________________________ d. What is the genotype of the black-furred offspring? By convention, P stands for the parental generation. The offspring are called...

In humans, brown (B) eye color is dominant to blue (b) eye color and brown (H)...

In humans, brown (B) eye color is dominant to blue (b) eye color and brown (H) hair color is dominant to red (h) hair color. [Assume single-gene traits] Of only the offspring that have brown eyes and brown hair (B_H_, where dash indicates that the individual could be either homozygous or heterozygous for the dominant allele), what proportion are expected to have a genotype that is heterozygous for one of the traits but homozygous for the other trait? A) 1/4...
Character Traits Allele Hair texture Dominant-curly Recessive-straight H h Eye color Dominant-brown Recessive-blue E e Nose...

Character Traits Allele Hair texture Dominant-curly Recessive-straight H h Eye color Dominant-brown Recessive-blue E e Nose width Dominant-wide Recessive-narrow N n SueBob’s genotype is: HHEeNn HenryJane’s genotype is: HheeNn What are the expected phenotypic ratios of their offspring? You can write your responses are a fraction or decimal Brown eyes and wide nose: Brown eyes and narrow nose: Blue eyes and wide nose: Blue eyes and narrow nose:
Genetics and Heredity Practice Problems A. Mendelian Genetics 1. In humans, achondroplasia or "dwarfism (D) is...

Genetics and Heredity Practice Problems A. Mendelian Genetics 1. In humans, achondroplasia or "dwarfism (D) is dominant over normal (d). A homorygous dominant (DD) person dies before the age of one. A heterozygous (d) person is dwarfed. A homozygous recessive individual is normal. If a heterozygous dwarf man marries a dwarf heterozyrous woman a. What is the probability of having a normal child? b. What is the probability of having a child that is a dwarf? What is the probability...

Character Traits Allele Hair texture Dominant-curly Recessive-straight H h Eye color Dominant-brown Recessive-blue E e Nose...

Character Traits Allele Hair texture Dominant-curly Recessive-straight H h Eye color Dominant-brown Recessive-blue E e Nose width Dominant-wide Recessive-narrow N n Using the table above, rewrite SueBob’s genotype. Describe Baby SueBob’s phenotype. When SueBob grows up, she starts a family with HenryJane. His genotype is HheeNn. Describe HenryJane’s phenotype. Complete a Punnett square to predict the probabilities of hair texture among their children. HenryJane’s Sperm SueBob’s eggs Complete the dihybrid cross to predict the probability of eye color AND...
7) In humans, brown eyes (B) are a simple dominant trait over blue eyes (b). What...

7) In humans, brown eyes (B) are a simple dominant trait over blue eyes (b). What is the genotype of a brown-eyed woman who has a blue-eyed child? A)bb -B)Bb С)ВВ D)BBB E) BbBb 8) The ability to roll the edges of the tongue upward in a U-shape is inherited as a dominant allele at a single gene locus, Which of the following genotypes would produce an individual that can roll their tongue? A)TT only B)Tt only C) only D)TT...
1. In humans, dark hair (D) is dominant over blond hair (d). If a heterozygous dark...

1. In humans, dark hair (D) is dominant over blond hair (d). If a heterozygous dark haired man had a son with his blond haired wife, what would the probability be that the son would have dark hair like his father? 2. a) In tomatoes, red fruit (R) is dominant over yellow fruit. If a homozygous red fruit plant is crossed with a yellow fruit plant, what are the expected genotypic and phenotypic ratios of the F1 generation? b) if...

3. Curly hair is dominant over straight hair c. If two Heterozygous, curly haired people had...

3. Curly hair is dominant over straight hair c. If two Heterozygous, curly haired people had children, what will be: c) Phenotype ratio: Punnet square: d) Genotype ratio:

In humans, the allele for black hair (B) is dominant to the allele to brown hair...

Homework Answers

Add Answer to:
In humans, the allele for black hair (B) is dominant to the allele to brown hair...

Post as a guest

Earn Coins

1. A monogenic trait (hair color) is controlled by the B locus with dominant B (brown)...

A colorblind woman marries a man who is not colorblind. What is the phenotypic ratio of...

In mice, black fur (B) is dominant over brown fur (b). Breeding a brown mouse and...

In humans, brown (B) eye color is dominant to blue (b) eye color and brown (H)...

Character Traits Allele Hair texture Dominant-curly Recessive-straight H h Eye color Dominant-brown Recessive-blue E e Nose...

Genetics and Heredity Practice Problems A. Mendelian Genetics 1. In humans, achondroplasia or "dwarfism (D) is...

Character Traits Allele Hair texture Dominant-curly Recessive-straight H h Eye color Dominant-brown Recessive-blue E e Nose...

7) In humans, brown eyes (B) are a simple dominant trait over blue eyes (b). What...

1. In humans, dark hair (D) is dominant over blond hair (d). If a heterozygous dark...

3. Curly hair is dominant over straight hair c. If two Heterozygous, curly haired people had...

In humans, the allele for black hair (B) is dominant to the allele to brown hair...

Homework Answers

Add Answer to: In humans, the allele for black hair (B) is dominant to the allele to brown hair...

Post as a guest

Earn Coins

Add Answer to:
In humans, the allele for black hair (B) is dominant to the allele to brown hair...