Question

5. A father with blue eyes (bb) is married to a woman with hazel eyes (Bb)....

5. A father with blue eyes (bb) is married to a woman with hazel eyes (Bb). Use a Punnett square to determine the genotypes and phenotypes of the offspring

Science   Biology   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

Here mother is a heterozygous dominant (Bb) and father is homozygous reccessive(bb).Alleles are B for hazel eyes and b for blue eyes.mother have two alleles one for hazel eyes and other for blue eyes,but father have both alleles for blue eyes.From the punnet square,we got the genotypic and phenotypic ratio as:

genotypic ratio :heterozygous domonant:homozygous recessive = 2:2

phenotypic ratio:hazel eyes :blue eyes =2:2

ie,phenotypes are 50% offsprings with hazel eyes and 50% offsprings with blues eyes ,equal probability for both.

genotypes are 50% with heterozygous dominant and 50% with homozygous recessive.

0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
12. In a species of bird, pink eyes (P) are dominant to blue eyes (p) and...
12. In a species of bird, pink eyes (P) are dominant to blue eyes (p) and long tails (L) are dominant to short tails (l). Two purebred (homozygous) birds mate, one with pink eyes and a short tail and the other with blue eyes and a long tail. Set up a Punnett Square to determine the genotypes and phenotypes that can result from this cross. a. What would be the genotypic ratio of the offspring? The pink-eyed offspring from above...
Blue eyes are recessive to brown. A brown eyed man marries a blue-eyed woman. What are...
Blue eyes are recessive to brown. A brown eyed man marries a blue-eyed woman. What are the possible phenotypes and genotypes of their potential children? How many could have blue eyes?
A brown eyed man whose mother was colorblind and whose father had blue eyes is engages...
A brown eyed man whose mother was colorblind and whose father had blue eyes is engages to marry a woman whose color blind mother had blue eyes and whose father had blue eyes and normal vision. Eye color is autosomal and brown is dominant. Color vision is X-linked and normal is dominant. (6) a) What is the genotype of the young gentleman? b) What is the genotype of his fiancé? c) What are the chances of having a brown-eyed, child...
. Blue eyes and inability to roll the tongue are recessive traits in humans.     Brown...
. Blue eyes and inability to roll the tongue are recessive traits in humans.     Brown eyes and tongue rolling are dominant traits.     Illustrate the F2 generation of two people: one who are heterozygous for both traits. Let B stand for brown eyes and b stand for blue eyes, R for the ability to roll the tongue and r for the inability to roll the tongue. Determine the phenotypic ratio in their offspring.             Parent Genotypes _BbRr   x   __________...
Question 61 pts __________ is a homozygous recessive genotype. BB Bb bb blue Flag this Question...
Question 61 pts __________ is a homozygous recessive genotype. BB Bb bb blue Flag this Question Question 71 pts If both parents are heterozygotes (Bb), what is the probability that their offspring will have a brown phenotype or have brown eyes? 25% 50% 75% 100% Flag this Question Question 81 pts If both parents are heterozygotes (Bb), what is the probability that their offspring will have a heterozygous genotype? 25% 50% 75% 100% Flag this Question Question 91 pts If...
A woman has just had twins, a boy and a girl. The woman’s father has two...
A woman has just had twins, a boy and a girl. The woman’s father has two X-linked recessive disorders, haemophilia and colour-blindness, but the woman is unaffected. The father of the children has neither disorder. Both disorders are completely penetrant. The loci for the two traits are known to be 5cM apart. a) What is the probability that the boy will be colour-blind but not haemophilic? Explain your answer, including showing the genotypes and phenotypes of the family. [10 marks]...
A widow’s peak is an autosomal dominant trait while a straight hairline is a recessive trait....
A widow’s peak is an autosomal dominant trait while a straight hairline is a recessive trait. Mike and his dad have a widow’s peak. Mike marries Bethany who has a continuous hairline like Mike’s mom. What is the probability that Mike and Bethany’s first child will have a widow’s peak? Complete Punnett Square to support your answer. Leave Blank Probability of first child: A 15-year old boy was diagnosed with a usual autosomal inherited form of diabetes. His mother was...
1. Conduct a dihybrid cross of pea plants with the following combination of traits: Parent 1—Tall...
1. Conduct a dihybrid cross of pea plants with the following combination of traits: Parent 1—Tall plant with white flowers (pure breeding); Parent 2—Dwarf plant with purple flowers (pure breeding). i) What are the genotypes of the parents? ii) What are the genotypes of their gametes? iii) Portray a cross and determine the F1 generation. Use a Punnett’s square. What are the genotypes and phenotypes of their offspring? iv) Conduct a F2 cross with the offspring. What are the genotypes...
Traditionally, blue-eye color is considered recessive to brown eyes in humans although, as noted in the...
Traditionally, blue-eye color is considered recessive to brown eyes in humans although, as noted in the chapter, eye color in humans is not a single gene trait. It has occasionally been the subject of folklore and “common knowledge” that blue-eyed parents usually have blue-eyed offspring. However, blue-eyed parents do often have brown-eyed children. In addition, when one brown-eyed child is born in this family, it is expected that subsequent children will also have brown eyes. Assuming the blue eyes really...
SHOW YOUR WORK!! In zinnia plants, purple flowers plants X blue flowering plants yield 54 purple...
SHOW YOUR WORK!! In zinnia plants, purple flowers plants X blue flowering plants yield 54 purple and 62 blue offspring. However crossing blue flowering plants X blue flowering plants yield ONLY blue flowering plants. a)What does this tell you about the genotypes of the blue and purple flowered plants? b)Which of the alleles is dominant? Mice can have normal tails or ‘bent’ tails. “Bent” is the dominant x- linked allele (B). The normal allele (b) is recessive. A normal-tailed female...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT