Lecture 10-Evolution of Sex

Question 1

Benefits of Asexual reproduction?

Answer 1

Greater reproductive output, good in stable environment and species with rapid generation time.

Question 2

Benefits of Sexual reproduction?

Answer 2

Generates new genotypes facilitating natural selection, allows for longer generation times

Question 3

What is Isogamy?

Answer 3

Fusion of similar gametes, produce many, low investment in each; fertilization by chance. (Quantity)

Question 4

What are anisogamy and oogamy?

Answer 4

Fewer female, high investments in each; protect and nourish egg & invest energy in choosing quality male (in females); invest energy in attracting female (in males)

Question 5

Characteristics of diplontic?

Answer 5

Diploid stage dominates, haploid stage confined to gametes

Question 6

Characteristics of Haplodiplontic

Answer 6

Diploid and haploid multicellular individuals. Dlploid stage in sporophyte, haploid stage in gametophyte. Alteration of generations

Question 7

Characteristics of haplontic?

Answer 7

Haploid stage dominates, diploid stage confined to zygote.

Question 8

What does deleterous mean?

Answer 8

Mutation is immedeately expressed and removed if not beneficial