cell cycle and dan structure: drawings and diagrams

Question 1

Label the following diagram of a chromosome

Answer 1

Question 2

Identify the stage of meiosis in the following picture

Answer 2

Anaphase II

Question 3

Identify the stage of meiosis in the following picture

Answer 3

Metaphase II

Question 4

Identify the stage of meiosis in the following picture

Answer 4

Prophase I

Question 5

Identify the stage of meiosis in the following picture

Answer 5

Telophase II

Question 6

Identify the stage of meiosis in the following picture

Answer 6

Anaphase I

Question 7

Identify the stage of meiosis in the following picture

Answer 7

Metaphase I

Question 8

Identify the stage of meiosis in the following picture

Answer 8

Telophase I

Question 9

Identify the stage of meiosis in the following picture

Answer 9

Prophase II

Question 10

Draw a diagram to show the process of meiosis

Answer 10

Question 11

Consider the following were crossed:

1. YY RR (yellow and round)
2. yy rr (green and wrinkled)

The resulting F1 generation is then crossed once again with each other. Construct a Punnett square to represent the situation.

Answer 11

Question 12

In sheep, the allele for black wool (B) is dominant over the allele for white wool (b).
Similarly, the allele for horns (H) is dominant over the allele for being hornless (h).
Pure breeding horned sheep with black wool were crossed with pure breeding hornless sheep with white wool.

(a) State the genotype and the phenotype of the F1 individuals produced as a result of this cross.
(b) Two F1 offspring were mated together. Calculate the expected ratio of phenotypes in the F2 generation.

Answer 12

Question 13

In cats, the allele for grey fur (G) is dominant over the allele for beige fur (g).
The allele for a solid coat (S) is dominant over the allele for a striped coat (s).
A pure breeding solid, beige cat is crossed with a pure breeding striped, grey cat.
(a) State the genotype and the phenotype of the F1 individuals produced as a result of this cross.
(b) Calculate the phenotypes resulting from a cross between a pure breeding solid, beige cat and an F1 offspring.

Answer 13

Question 14

Consider a red flower and a white flower breed. The colour of the flowers, red and white, are codominant alelles.

a) What is the colour of the F1 generation?
b) Two flowers from the F1 generation are crossed. Draw the Punnett square.

Answer 14

Question 15

Two beans, yy (green) and Yy (yellow) are crossed, where Y is the dominant allele for yellow and y is the ressessive allele for green.

a) Draw the Punnett square.
b) What fraction of the beans will be yellow?

Answer 15

a) Refer to picture
b) 1/2 (50%)

Question 16

Two flowers, Bb and Bb are crossed, where B is the dominant allele for blue and b is the resessive allele for white.

a) Draw the Punnett square
b) What is the expected ratio of blue:white flowers?

Answer 16

a) Refer to picture
b) 3 blue:1 white

Question 17

Consider two beans, AaBb, are crossed with each other.

A and B are gene-linked.

a and b are gene-linked.

Construct a Punnett square that represents this situation.

Answer 17

Question 18

Hemophilia is a sex-linked disorder. It is x-linked recessive.

The father is unaffected and the mother is a carrier.

a) Construct a Punnett square to represent the situation
b) What are the overall chances that the child will be inflicted with (ie. suffer the symptoms of) hemophilia?
c) Assuming the child is male, what are the chances that he will be inflicted?
d) Assuming the child is female, what are the chances that she will be inflicted?

Answer 18

a) Refer to picture
b) 1/4
c) 1/2
d) 0