__________ are traits where the allele is dominant in one sex but recessive in the other sex.

What causes the difference in expression between male and females in sex-influence traits?

Which of the following is NOT an example of a sex-limited trait?

Which of the following is an example of a sex-influenced trait?

_________ is the term given to the phenomenon that "equalizes" the sexes. One of the X chromosomes in each cell of a female embryo is turned off so that only one X chromosome is being expressed (just like in male cells).

________ is when a disease may be more severe or different depending upon which parent transmitted the gene.

Which version of a Chromosome 15 deletion results in the offspring exhibiting the following traits: obese, small hands and feet, eats uncontrollably and does not mature sexually. (This deletion comes from the father.)

Which version of a Chromosome 15 deletion results in the offspring exhibiting the following traits: mental impairment, extended tongue, large jaw and poor muscle coordination and convulsions that make the arms flap. (This deletion comes from the mother.)

Carefully examine this pedigree. Determine the mode of inheritance for this trait.

Carefully examine this pedigree. Using the letters H/h for the alleles, determine the genotype for individual #8.

Carefully examine this pedigree. Using the letters H/h for the alleles, determine the genotype for individual #21.

Carefully examine this pedigree. Using the letters H/h for the alleles, determine the genotype for individual #2.

Carefully examine this pedigree. Using the letters H/h for the alleles, determine the genotype for individual #11.

Carefully examine this pedigree. Using the letters H/h for the alleles, determine the genotype for individual #18.