Bio Final

Front 1

Which of the following are not correct about viroids?

Back 1

infect animals

Front 2

If the plant species exhibits maternal inheritance for leaf pigmentation, such as the 4'oclock plant, what is the phenotype of the parents of a variegated plant?

Back 2

the maternal plant must be variegated and the paternal plant can be any color

Front 3

A scientist has been growing a bacteria strain for some time in a culture media containing very few nutrients. The cells are growing slowly, so she enriches the media with amino acids and carbohydrates. To her dismay, instead of growing faster and to higher densities, the bacteria begin to die. What is causing this strange result?

Back 3

The bacteria is infected with a temperate phage which has switched it from the lysogenic to a lytic cycle.

Front 4

Gene S controls the sharpness of cactus spines. Cactuses with the dominant alle, S, have sharp spines and those with the recessive ss have dull spines. At the same time, a second gene, N, determines whether cactuses have spines. Homozygous recessive nn cactuses have no spines at all. The relationship between S and N demonstrates what?

Back 4

epistasis

Front 5

Which of the following represent polygenic inheritance?

Back 5

skin pigmentation in humans

Front 6

When a disease is said to have a multifactorial basis?

Back 6

many factors, both genetic and environmental, can contribute to the disease.

Front 7

How would one explain a testcross involving F1 dihybrid flies in which one parental-type than recombinant-type offspring are produced?

Back 7

The two genes are linked

Front 8

Line graph question

Back 8

between A and G

Front 9

What is the mechanism for the production of genetic recombinants?

Back 9

crossing over and independent assortment

Front 10

In cats, black fur color is caused by an X-linked allele; the other gene at this locus is for orange color. The heterozygote is a tabby cat. What kind of offspring would you expect from the cross of a black female and an orange male?

Back 10

tabby female and black male

Front 11

Which of the following statements is not part of Morgan's Theory of Independent Assortment?

Back 11

linked genes are always inherited together

Front 12

Which of the following RNA is required for X inactivation?

Back 12

Xist B

Front 13

Insulin-growth factor 2 is important in mouse size, normal vs. dwarf. Only one allele, paternal, is expressed during prenatal development. This is an example of...

Back 13

genomic imprinting

Front 14

Which of the following mitochondrial disease is a result of a mutation in a tRNA for leucine?

Back 14

cardiomyopathy

Front 15

Which of the following is a characteristic of all viruses?

Back 15

nucleic acid genome
protein capsid

Front 16

Viruses are referred to as obligate parasites because

Back 16

they cannot reproduce outside the host cell

Front 17

Which life cycles do virulent and temperate phages undergo?

Back 17

virulent=lytic life cycle
temperate=lysogenic

Front 18

What is the function of reverse transcriptase in retroviruses?

Back 18

It uses viral RNA as a template for DNA synthesis.

Front 19

Which of the following steps are not part of the lysogenic life cycle?

Back 19

synthesis

Front 20

Which of the following neurodegenerative diseases are not caused by prions, to the best of our knowledge?

Back 20

Alzheimers

Front 21

Genetic diversity in bacteria is caused by..

Back 21

mutation
genetic transfer

Front 22

What are prions?

Back 22

misfolded versions of normal brain proteins

Front 23

DNA is transferred from one bacterium to another by a virus?

Back 23

transduction

Front 24

a group of F+ bacteria get mixed with a group of F- bacteria and after several days all of the bacteria are F+

Back 24

conjugation

Front 25

the ability of bacteria to take up foreign DNA

Back 25

conjugation