Which of the following are true about how sex is determined in different types of organisms?
a) Humans have an XX/XY chromosomal sex determination system.
b) Hyenas are unusual because in this species, males produce eggs and females produce sperm.
c) In some species, environmental factors determine sex, not genetic factors.
Which of the following statements about sex-influenced traits are true?
a) Sex-influenced traits are found on one of the sex chromosomes.
b) A single sex-influenced genotype may be expressed differently in males than in females.
c) Sex-influenced traits will only be found in organisms with environmental sex determination.
d) Sex-influenced traits can be used to distinguish virgin individuals of a species from non-virgin ones.
e) both a and b
f) both a, b, and c
g) both b and c
h) both b, c, and d
Which of the following are true of recombination?
a) Recombination is typically caused by a crossing-over event during meiosis.
b) The closer two genes are on a chromosome, the more likely they are to recombine.
c) Recombination allows organisms to produce gametes with new combinations of alleles.
d) The recombination rate between two genes can be calculated by dividing the number of recombinant gametes by the number of non-recombinant gametes.
e) both a, b, and c
f) both a, b, c, and d
g) both a and c
h) both a, c, and d
d) Male organisms can always be identified by the presence of a penis.
e) both a and c
f) both a, c, and d
g) both a and d
h) both b, c, and d