Biology I mendelian genetics

Which of the following could be considered heterozygous?

• GG

• Hh

• kk

• yy

In a pedigree chart, a female that showed a particular trait would be shown as a

• open circle

• open square

• darkened circle

• darkened square

A heterozygous organism is mated with another heterozygous organism. This special kind of cross is called a

• dihybrid cross

• incomplete dominance

• mutation

• monohybrid cross

what is the major purpose of the Y chromosome?

• to prevent mutation

• to enable crossing over

• to make an individual male

• to protect the individual from genetic disease

How is it possible for two parents who do NOT show a trait to produce a child that DOES show the trait?

• The parents are both passing a recessive allele on to their offspring

• The trait becomes dominant in the offspring

• Environmental factors make the trait evident in the offspring

• Inbreeding makes traits appear that had not existed before

Chromosomes that are NOT sex chromosomes are called _________ chromosomes

• heterozygous

• autosomal

• allelic

• generic

What type of inheritance is shown when the dominant trait entirely hides the recessive trait?

• complete dominance

• incomplete dominance

• codominance

• sex-linked (X- linked)

In what type of inheritance is the heterozygote state midway between the two homozygotes? Ex: RR- red, Rr- pink, rr- white

• complete dominance

• incomplete dominance

• codominance

• sex-linked (X- linked)

What type of inheritance is shown with blood types?

• complete dominance

• incomplete dominance

• codominance

• sex-linked (X- linked)

What type of inheritance is shown with the trait of interest carried on the X chromosome?

• complete dominance

• incomplete dominance

• codominance

• sex-linked (X- linked)