Biology Genetics Test Nov 2014

Front 1

Two gametes (sex cells) combine during

Back 1

Sexual reproduction

Front 2

What is one function of Mitosis?

Back 2

to equally divide replicated chromosomes into daughter cells

Front 3

Sperm cells of the Russian dwarf hamster contain 14 chromosomes. How many chromosomes are found in a normal body cell of the Russian dwarf hamster?

Back 3

28

Front 4

A cell with 20 chromosomes undergoes MITOSIS. What will be the end result?

Back 4

2 daughter cells will be reated and each daughter cell will have 20 chromosomes

Front 5

What is one function of MEIOSIS?

Back 5

to create gametes for reproduction

Front 6

The allele for green pod color (G) is dominant over the allele for yellow pod color (g). What is the genotype for a plant with yellow pods?

Back 6

gg

Front 7

Assume that in humans, brown eyes (B) is dominant over blue eyes (b). The mother’s genotype is bb and the father’s is Bb. What are the predicted frequencies of eye color of the children of these parents?

Back 7

1/2 brown eyes and 1/2 blue eyes

Front 8

Down syndrome, a genetic disorder caused by an extra 21st chromosome, is caused by ____

Back 8

multiple alleles

Front 9

Assume that in humans, brown eyes (B) is dominant over blue eyes (b). The mother’s genotype is bb and the father’s is Bb. What are the predicted frequencies of eye color of the children of these parents?

Back 9

1/2 brown eyes and 1/2 blue eyes

Front 10

Cystic fibrosis is a genetic disease that causes serious respiratory problems. Brad and Janet are healthy adults with three children. Two of the children appear to be healthy and one child has cystic fibrosis. The normal allele is represented as C. The disease-causing allele is represented as c. What is Brad’s genotype? What is Janet’s genotype?

Back 10

Brad = Cc; Janet = Cc

Front 11

If an organism has two identical alleles for a single trait, for that trait the organism is considered

Back 11

homozygous

Front 12

In humans the gene for polydactyly (having extra fingers or toes) is dominant over the gene for the normal number of digits. If parents who are both homozygous dominant for polydactyly have four children, how many of these children would most likely have extra fingers or toes?

Back 12

4

Front 13

In a certain species of bird, the allele for red feathers (R) is dominant over the allele for green feathers (r). When a heterozygous red-feathered bird is mated with a green-feathered bird, what percentage of the offspring is likely to possess the red feather trait?

Back 13

50%

Front 14

A cross between two plants that have pink flowers produced offspring that have red, pink, or white flowers. Which is the most likely explanation for these results?

Back 14

The allele for flower color shows incomplete dominance

Front 15

If an individual has two recessive alleles for the same trait, the individual is said to be ____ .

Back 15

homozygous for the trait

Front 16

In a Punnett Square, the letters in each box represent what?

Back 16

one possible genotypic outcome for the offspring

Front 17

A female guinea pig that is homozygous dominant for black fur color is mated with a male homozygous for white fur. If they had a litter of 8 offspring, what color fur would their offspring have?

Back 17

All 8 offspring would have black fur.

Front 18

Tay-Sachs disease is an autosomal recessive disorder. A child is born that is determined to have the disorder, however his parents appear normal. What has probably happened?

Back 18

Both parents carried the allele for the disorder.

Front 19

The offspring of sexual reproduction ,,,,

Back 19

Receives half of its genetic material from each parent.

Front 20

The offspring of asexual reproduction....

Back 20

Receives all of its genetic material from one parent.

Front 21

The typical sex chromosomes of a male human are

Back 21

XY

Front 22

Mitosis or Meiosis? Homologous chromosomes pair up along the equator?

Back 22

Meiosis

Front 23

Mitosis or Meiosis? Associated with growth and repair of tissues.

Back 23

Mitosis

Front 24

Mitosis or Meiosis? Daughter cells are not identical to the parent cell.

Back 24

Meiosis

Front 25

Mitosis or Meiosis? Associated with sexual reproduction.

Back 25

Meiosis

Front 26

Mitosis or Meiosis? Skin cells would reproduce through this process.

Back 26

Mitosis

Front 27

This is an example of a gamete.

Back 27

Sperm cell

Front 28

An unfertilized egg is what type of cell?

Back 28

Haploid

Front 29

Bacillus thuringiensis (Bt) is a bacterium that contains a gene that results in the production of a natural pesticide that kills insects. Genetic engineers have successfully inserted this Bt gene into the DNA of some corn varieties, allowing the corn to produce its own pesticide. If a genetically modified corn cell reproduces through mitosis, what is the probability that the daughter cells will contain the inserted gene?

Back 29

100% of the daughter cells will contain the inserted gene.

Front 30

When there are two identical alleles for a trait

Back 30

homozygous

Front 31

When there are two different alleles for a trait

Back 31

heterozygous

Front 32

This trait is NOT expressed in a hybrid

Back 32

recessive

Front 33

The actual genetic makeup of an organism; represented by alleles

Back 33

genotype

Front 34

Describes the physical appearance of an organism

Back 34

phenotype

Front 35

What is the correct relationship between an allele and a gene?

Back 35

genes are the physical form of allele combinations

Front 36

Reproductive cells, such as sperm and egg cells, are called

Back 36

gametes

Front 37

Brown eyes is dominant over blue eyes in humans. What is the likelihood of two blue-eyed parents having a brown -eyed child?

Back 37

0%

Front 38

You need to be able to identify these on a diagram

Back 38

Parts of a nucleotide: sugar, phosphate, base. And be able to circle all three parts to represent a nucleotide.

Front 39

In the cells of most organisms, DNA is contained in the ____ .

Back 39

nucleus