Exam/Quiz Corrections

Question 1

Compare and contrast sexual reproduction with asexual reproduction.

Answer 1

I did’t put enough detail.

Asexual reproduction involves one parent and produces offspring that are genetically identical to each other and to the parent. Sexual reproduction involves two parents and produces offspring that are genetically unique.

Question 2

Define crossing over and list the phase in which it occurs.

Answer 2

I gave incorrect info and didn’t do part of it

Crossing over occurs during prophase I and is the process where two homologous non-sister chromatids pair up with each other and exchange different segments of genetic material to form two recombinant chromosome sister chromatids

Question 3

Why must sex cells first undergo meiosis before fertilization?

Answer 3

I didn’t go into enough detail

To create haploid gametes that will be used in fertilization; need to reduce the number of chromosomes to n in order to correctly yield a 2n (diploid) organism during fertilization, if not problems may occur

Question 4

Discuss two ways meiosis contributes to genetic variation.

Answer 4

I only gave one example

Crossing over; random lining up of chromosomes at equator

Question 5

During which stage do the cells below have only one allele for each gene?

Answer 5

I couldn’t see the image.

E

Question 6

Refer to D on the diagram. What stage of meiosis does it represent?

Answer 6

I couldn’t see the image.

Prophase II

Question 7

Phenotype:

Answer 7

I forgot

Brown Eyes

Question 8

Suppose you are trying to predict the offspring of two plants, knowing that they are both heterozygous. What percentage of the offspring will be heterozygous?

Answer 8

I thought about it wrong

Suppose you are trying to predict the offspring of two plants, knowing that they are both heterozygous. What percentage of the offspring will be heterozygous?