How many SEX chromosomes are the human cell

26 Jun How many SEX chromosomes are the human cell

Question
Question 1

1.

How many SEX chromosomes are the human cell?

Answer

2

1

23

22

4 points

Question 2

1.

Crossing over

Answer

involves recombination between non-homologous chromosomes

occurs between adjacent tetrads

occurs only between members of a tetrad

involves recombination between sster chromatids

4 points

Question 3

1.

Mitosis results in ________ daughter cells and meiosis results in ______ daughter cells.

Answer

2, 4

4, 4

2, 2

4, 2

4 points

Question 4

1.

During what phase of meisosis does croosing over occur?

Answer

Prophase II

Metaphase I

Telophase II

Interphase I

4 points

Question 5

1.

In Mendel’s particulate theory of inheritance, we now call the “particles” _____.

Answer

genes

chromosomes

mitotic figures

plants

4 points

Question 6

1.

The offspring (phenotype) of an F1 crossed with a homozygous recessive woul be

Answer

all dominant (G)

all recessive (g)

75% dominant (G), 25% recessive (g)

50% dominant (G), 50% recessive (g)

4 points

Question 7

1.

Chargraff’s rule states that the amount of A, T, G, and C in DNA

Answer

is the same from species to species, but the amount of A=T and G=C

varies from species to species, but the amount of A=G and T=C

varies from species to species, but the amount of A=T and G=C

is the same from species to species, but the amount of A=G and T=C

4 points

Question 8

1.

How many nucleotide bases make up a code for a single amino acid?

Answer

2

it varies with the amino acid

3

4

4 points

Question 9

1.

What is the term given for the three nucleotide bases on a transfer RNA molecule?

Answer

mRNA

ribosome

anticodon

codon

4 points

Question 10

1.

Which of the following most increasees the changes of a spontaneous abortion?

Answer

amniocentesis

chorionic villous sampling

separating fetal cells from a maternal blood sample

karyotyping

4 points

Question 11

1.

The inactive X chromosome in females becomes a(n)

Answer

Y chromosome

Barr body

Andrus body

Polar body

4 points

Question 12

1.

If a woman who suffers from the sex-linked recessive disorder hemophilia marries a man who does not, what are the chances that her children wil suffer from the disease?

Answer

None of her sons and all of her daughters will suffer from the disorder

All of her sons and none of her daughters will suffer from the disorder

75% of her sons and 25% of her daughters will suffer from the disorder

Half of her sons and half of her daughters will suffer from the disorder

4 points

Question 13

1.

A bacteriophage is a

Answer

a virus that only infects bacteria

a virus that phagocytizes bacteria

a bacteria that causes a deadly disease in humans

a bacteria that phagocytizes other bacteria

4 points

Question 14

1.

The enzyme unique to retroviruses is

Answer

DNA polymerase

RNA polymerase

reverse transcriptase

DNA gyrase

4 points

Question 15

1.

Most prions cause disease when they effect the

Answer

nervous system

heart muscle

the liver

the intestinal tract

4 points

Question 16

1.

The primary producers at deep sea vents are

Answer

heterotrophs

symbionts

chemoautotrophs

photoautotrophs

4 points

Question 17

1.

Methanogens belong to the domain

Answer

Plantae

Bacteria

Eukarya

Archaea

4 points

Question 18

1.

A fruit is derived from

Answer

the ovule

an ovary

the corolla

the calyx

4 points

Question 19

1.

Most fungi

Answer

move by the action of cilia

are multicellular

have cell walls composed of cellulose

are in the domain Archaea

4 points

Question 20

1.

Fungi obtain nutrition by

Answer

photosynthesis

pinocytosis

absorbing food that has been digested outside of the “body” of the fungus

phagocytosis

4 points

Question 21

1.

Mycorrhizal fungi

Answer

are a type of lichen

help plants gather solar energy

all of these are correct

help plants gather inorganic nutrients

4 points

Question 22

1.

Xylem is

Answer

a polysaccharide found in the cells wall of fungi

a plant vascular tissue that transports water and minerals

a plant vascular tissue that transports organic compounds

a polysaccharide found in the cell wall of plants

4 points

Question 23

1.

The largest group of plants are

Answer

angiosperms

bryophytes

lycophytes

ferns

4 points

Question 24

1.

A mushroom is

Answer

the reproductive organ of ferns

the reproductive organ of certain fungi

the photosynthetic organ of some fungi

the body of a fungus

4 points

Question 25

1.

Bacterial endospores are

Answer

survival structures of some bacteria

the photosynthetic structure of some bacteria

the structure that houses bacterial DNA

the reproductive structures of some bacteria