Test 1

Question 1

Which of the following describes “inheritance of acquired characteristics”?

Answer 1

Traits acquired in a person’s lifetime become incorporated in that person’s hereditary information

Question 2

Allele refers to ….

Answer 2

Alternate form of a gene

Question 3

The branch of genetics that encompasses how traits are passed on from one generation to the next is ….

Answer 3

Transmission Genetics

Question 4

Which of the following statement is false?

Answer 4

Prokaryotic cells have a nucleus

Question 5

Which of the following best describes phenotype?

Answer 5

It is influenced by both the genotype and the environment

Question 6

What is population genetics?

Answer 6

It explores the genetic composition of a population

Question 7

Which of the following involves application of genetic principles?

Answer 7

artificial selection of pigs that have fast growth rates as parents of the next generation of offspring

Question 8

Which of the following contributed to our modern understanding of genetics?

Answer 8

a recognition that the cell nucleus contained the hereditary information

Question 9

What does blending inheritance indicate about the way traits are inherited?

Answer 9

Traits of offspring are a blend, or mixture, of parental traits

Question 10

What is the overall purpose of mitosis?

Answer 10

to produce 2 identical daughter cells

Question 11

What are the two phases of the cell cycle?

Answer 11

interphase and M phase

Question 12

Haploid cells have …

Answer 12

one set of chromosomes

Question 13

Which of the following events takes place in metaphase of mitosis

Answer 13

chromosomes line up at the equator of the cell

Question 14

Which event takes place during anaphase I?

Answer 14

Homologous chromosomes separate

Question 15

Which of the following statement is false?

Answer 15

Non-sister chromatids exchange genetic material during prophase of mitosis

Question 16

A cell contains 4 chromosomes in G2. How many chromosomes and dna molecules did the cell have in G1?

Answer 16

4; 4

Question 17

A cell in metaphase of mitosis has 4 chromosomes. How many chromosomes would be present in the cell of the same organism if it were in prophase of mitosis?

Answer 17

4

Question 18

Genetic variability among gametes are partly due to

Answer 18

crossing over in prophase I

Question 19

Replacement of damaged skin cells occurs through….

Answer 19

mitosis

Question 20

A scientist crosses a homozygous red flower with a homozygous white flower. All of the resulting offspring are heterozygous with red flowers.

Assuming that flower color is controlled by a single gene, which of the following statements is most likely true?

Answer 20

The allele for red flowers is dominant to the allele for white flowers

Question 21

The principle of dominance states that:

Answer 21

Some alleles are dominant and others are recessive

Question 22

The separation of homologous pairs of chromosomes during meiosis is the physical basis of….

Answer 22

the law of segregation

Question 23

The Law of Independent Assortment applies:

Answer 23

to pairs of genes that are on different chromosomes

Question 24

When does random alignment of pairs of homologous chromosomes occur ?

Answer 24

there is random alignment of pairs of homologous chromosomes during meiosis I

Question 25

A dihybrid cross is one in which...

Answer 25

the inheritance of 2 traits are studied

Question 26

In a dihybrid cross of seed color and seed shape, Y (yellow) is dominant to y (green) and R (rounded) is dominant to r (wrinkled). The inheritance of the alleles for seed color does not affect inheritance of genes for seed shape. A homozygous yellow wrinkled seed is crossed with a homozygous green rounded seed. Give the genotype of the F1 seed.

Answer 26

YyRr

Question 27

In a dihybrid cross of seed color and seed shape, Y (yellow) is dominant to y (green) and R (rounded) is dominant to r (wrinkled). A plant with yellow and wrinkled seeds is crossed with another plant with yellow and wrinkled seeds. The inheritance of the alleles for seed color does not affect inheritance of genes for seed shape. Which of the following is the genotype of an offspring of the cross.

Answer 27

yyrr

Question 28

What is the phenotypic ratio for a cross between a plant with blue flowers BB (homozygous dominant) and a plant with white flowers bb (homozygous recessive)?

Answer 28

All blue