12-03 Selective Breeding

How many generations are shown in this pedigree?

(enter number only)

This pedigree represents the inheritance of hemophilia in this family. How many of the females have the hemophilia trait?

(enter number only)

How many people in this whole pedigree have the trait/disease?

(enter number only)

If this pedigree shows hemophilia, which is an autosomal recessive disorder, what MUST the genotype of individual II-3 be if N = normal?

In this pedigree, the shading represents people in the family with dark hair while the unshaded represents blondes. Is dark hair controlled by a dominant or recessive allele?

• Dominant

• Recessive

Huntington's Disease is an autosomal dominant trait.

What is the correct genotype for individual I-2?

• HH

• Hh

• hh

• H?

What is an example of artificial selection?

• Letting dogs choose their own mate

• Letting plants pollinate on their own

• Crossing a labrador and a poodle to create a labradoodle

• Letting the lab mice mate freely, once a year.

One disadvantage of inbreeding is -

• creating a new species.

• gene variety is lost.

• new food sources.

• it increases genetic variablity.

Which is a goal of selective breeding?

SELECT ALL THAT APPLY

• To increase the value of species to humans

• To produce species that resist disease

• To produce species with desired traits

• To make specific changes to the DNA code.

The purpose of selective breeding is to

• get bigger animals

• get smaller animals

• create animals with desired traits

• create animals with bad traits