Question

Multiple Choice: Read and analyze each item carefully. Choose and encircle the letter of the correct answer.

1. What type of inheritance do two alleles have if their traits blend together?

A. Co-Dominance C. Incomplete dominance

B. Mendelian inheritance D. homozygous inheritance

2. Pink four o’ clock flowers are obtained from a cross between pure bred red flower (RR) and white flower (WW) plant? What is the genotype of the pink flowers?

A. RR B. WW C. RW D. rr



For numbers 3 - 5, two pink four o’clock flowers were crossed.



3. Complete the Punnett square.





R W

R

W



4. What are the genotypes of the offspring produced?

A. RW B. RR C. . WW D. RR, RW,WW,



5. What are the phenotypes of the offspring produced?

A. pink B. red C. . white D. red, pink and white



6. What type of inheritance do two alleles have if both are expressed equally in the phenotype of the heterozygote?

A. Codominance C. Incomplete dominance

B. Mendelian inheritance D. homozygous inheritance



7. A calico cat shows both the traits for orange fur and black fur. What kind of non-Mendelian inheritance is this?

A. Codominance C. Incomplete dominance

B. Recessive Inheritance D. Independent Assortment

















8. Complete the Punnett square for a cross between a black chicken (BB) and a checkered chicken (BW).













9. Give the phenotypic ratio of the offspring in #8: _______________________



10. Give the genotypic ratio of the offspring in #8: ________________________



11. In the ABO blood group systems in humans, what two alleles are codominant?

A. IA & IA B. IA & IB C. IB & i D. IA & i

12. What blood types can be found in an offspring if a mother has type A and the father has type B blood?

A. A, B B. A, O C. AB, O D. A, B, AB, O

13. A man has blood type A (homozygous) and a woman has blood type B (heterozygous). What are the possible blood types of their kids?

A. AB only B. A or B only C. A or AB only D. A or O only

14. A woman with blood type O and a man with blood type AB have a child together. What are the possible blood types of this child?

A. A or B B. AB or O C. A, B, or O D. A, B, AB, or O

15. If a woman has blood type O and her child also has O blood type, which of the following could NOT be possible blood type of the father?

A. A B. AB C. B D. O

II. For 15 points, trace the blood types of your family by using a sample family tree below. Write the blood type of each member of your family in the corresponding boxes (add or erase boxes if necessary). Then, infer the possible genotypes of your parents. You may use the punnett square









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Answer 1

Answer:

It was a large lovely garden, with soft green grass. Here and there over the

grass stood beautiful flowers like stars, and there were twelve peach trees

that in the spring-time broke out into delicate blossoms of pink and pearl, and

in the autumn bore rich fruit. The birds sat on the trees and sang so sweetly

that the children used to stop their games in order to listen to them. ‘ How

happy we are here!’ they cried to each other.

One day the Giant came back. He had been to visit his friend the Cornish

Ogre, and had stayed with him for seven years. After the seven years were

over he had said all that he had to say, for his conversation was limited, and

he determined to return to his own castle. When he arrived he saw the

children playing in the garden.‘What are you doing?’ he cried in a very gruff

voice, and the children ran away. ‘ My own garden is my own garden,’ said

the Giant; ‘ anyone can understand that, and I will allow nobody to play in it

but myself.’ So he built a high wall around it, and put up a notice board:

1:Which words of the Giant bring out his selfishness ?

Answer 2

ABO blood grouping followa codominant trait.

Explanation:

1. (c) incomplete dominance, as the traits blend with each other.
2. (c) RW, because one allele is from red flower and the other is from white flower.
3. In the figure.
4. (d) RR, RW, WW
5. (d) Red, pink and white
6. (a) Codominance, when both the alleles show their traits in heterozygous form then it is called codominance inheritance.
7. (a) Codominance
8. In the figure.
9. Phenotypic ratio in 8 cross is 1:1, that is 50% black chicken and 50% checkered chicken.
10. Genotypic ratio in 8 cross is again 1:1, that is 50% BB(black chicken) and 50% BW(checkered chicken).
11. (b) IA and IB are codominant alleles in ABO blood grouping.
12. (d) A,B,AB and O blood groups can be found in offsprings of parents having A and B blood group only if they both have heterozygous pattern.
13. (c) A or AB, as the man is homozygous A that means that he has both the alleles as IA and woman is heterozygous B that means she has alleles as IB and i which makes the alleles for offspring as IA, IB and i, thus the combination of any two of them provide us with blood group either A or AB.
14. (a) A or B, , as the man is O that means that he has both the alleles as i and woman is AB that means she has alleles as IA and IB which makes the alleles for offspring as IA, IB and i, thus the combination of any two of them provide us with blood group either A or B.
15. In the figure.