Question

How is sex usually determined in birds?
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a
The number of sets of chromosomes determines whether the individual is male or female.

b
The total number of sex chromosomes determines whether the individual is male or female.

c
Females have two identical sex chromosomes and males have two different sex chromosomes.

d
Females have two different sex chromosomes and males have two identical sex chromosomes.

Answer 1

c
Females have two identical sex chromosomes and males have two different sex chromosomes.