BMST BMST - Basic Math and Science Genetics and Heredity Questions and Answers 5

Question 1

In incomplete dominance, a red-flowered plant (RR) is crossed with a white-flowered plant (WW). What color will the F1 flowers be?

Accepted Answer

Pink

Answer

In incomplete dominance, heterozygotes (RW) show an intermediate phenotype, producing pink flowers.

Question 2

A mutation in a somatic cell (non-reproductive body cell) is:

Accepted Answer

Passed only through mitosis to daughter cells of that cell

Answer

Somatic mutations affect only the cells that descend from the mutant cell via mitosis; they are not transmitted to the next generation.

Question 3

The law of independent assortment states that:

Accepted Answer

Alleles of different genes are distributed independently during gamete formation

Answer

Mendel's law of independent assortment states that alleles of different genes segregate independently of one another during gamete formation.

Question 4

Which of the following best describes a test cross?

Accepted Answer

Crossing an organism of unknown genotype with a homozygous recessive individual

Answer

A test cross reveals the unknown genotype by mating the organism with a homozygous recessive individual and analyzing the offspring.

Question 5

Down syndrome (Trisomy 21) results from:

Accepted Answer

Three copies of chromosome 21 due to nondisjunction

Answer

Down syndrome occurs when nondisjunction during meiosis results in an egg or sperm with two copies of chromosome 21, giving the offspring a total of three.

BMST - Basic Math and Science Test Practice Test

BMST - Basic Math and Science Test Practice Test

BMST BMST - Basic Math and Science Genetics and Heredity Questions and Answers 5