Sex-Linked Traits

Sex-Linked Traits

Genetics

Multiple Select

Which of the following are sex chromosomes?

• X

• Pairs #1-22

• Y

Multiple Choice

Which genotype represents a male that has normal vision? (not color blind)

• X^BX^b

• X^BY

• X^bY

• X^BX^B

Multiple Select

Which of the following genotypes is a female with normal vision? (select all that apply)

• X^BX^b

• X^BX^B

• X^bX^b

• X^BY

Practice Problems!

If you still have your paper from last time, get it out, or get a new one

As you can see, many sex-linked traits are recessive

Its actually a co-dominant trait: whoever made this question made a mistake :)

Multiple Choice

Are males or females more likely to be carriers for sex-linked traits?

• Males

• Females

• Both

Multiple Choice

Why can males not be carriers for many sex-linked traits?

• Because males are more affected by diseases

• Because males only have 1 X chromosome and whatever allele it carries is what they are (they can't be heterozygous)

• Because females can overcome diseases regardless of their genes