Chapter 6 (Part 1)

Question 1

humans have how many pairs of homologous chromosomes?

Answer 1

23 pairs

Question 2

what is an allele?

Answer 2

a different varients of a gene

Question 3

what is a genotype

Answer 3

alleles make up your genotype

Question 4

what is heredity

Answer 4

the transfer of certain alleles from parent to offspring

Question 5

a visible feature or function caused by a gene is called what?

Answer 5

a trait or a phenotype

Question 6

who was gregor mendel?

Answer 6

he was a monk that studied pea plants in the 1800. he studied the phenotypes of generations of peas.

Question 7

what did mendel not know about?

Answer 7

he didnt know about DNA or that most organisms have 2 copies of each gene but discovered the inheritance pattern of dominant-recessive traits

Question 8

homozygous

Answer 8

when the alleles for the trait are the same

Question 9

heterozygous

Answer 9

when the alleles for a trait are different

Question 10

mendel determined that the phenotype ratio is…

Answer 10

3:1

Question 11

mendel determined that the genotype ratio is…

Answer 11

1:2:1

Question 12

probability refers to

Answer 12

the likelihood that some event will occur

Question 13

what is a Punnett square?

Answer 13

it lists the possible gamete (alleles) from one individual on one side of the square (rows) and the possible gametes from the other individual on the opposite side (columns)

Question 14

looking at one trait is called a

Answer 14

monohybrid cross