Question

16.
Which factors can affect a person’s height?

a person’s karyotype

genes only

both genes and environmental factors

a person’s blood type


17.
How does a geneticist use pedigrees?

to prove that sex-linked traits are caused by codominant alleles

to replicate identical strings of DNA

to trace the inheritance of traits in humans

to create genetic crosses


18.
Use the diagram to answer the question.


Which individuals do not exhibit the trait and are not carriers?


A, C, E, G, I, L, N, and O

B, D, F, H, J, K, M, P, and Q

A, C, F, J, N, and O

B, D, E, G, H, I, K, L, M, P, and Q


19.
Sex-linked genes are genes on _____.

the X and Y chromosomes

the X chromosome only

all 23 pairs of chromosomes

the Y chromosome only


20.
A karyotype can be used to diagnose the genetic disorder called _____.

hemophilia

sickle-cell disease

Down syndrome

cystic fibrosis

Answer 1

16 is both genes and environmental factors

17 is to trace the inheritance of traits in humans

18 is A, C, F, J, N, and O

19 is all 23 pairs of chromosomes

20 is cystic fibrosis

Answer 2

20. No, cystic fibrosis is caused by a gene mutation. Karyotypes can detect abnormalities only in chromosome number.
19. Not the best answer.
18. No diagram
16,17 correct