genetics

If a father has an x-linked recessive disease, will he pass the allele on to his sons?

• yes

• no

If a father has an x-linked recessive disease, will his daughters get the disease?

• yes

• no, but they will become carriers

• no, they will not get the allele

If a carrier x-linked recessive female mates with a male with the disease, could any of their children be unaffected?

• no

• yes

If a male has one mutant/diseased allele for an x-linked recessive disorder, will they be considered affected?

• yes

• no, but they will be a carrier

• no, they do not have the disease

How can you tell if a disease is a dominant trait

• it is seen in every other generation on a pedigree

• it is seen in every generation on a pedigree

• every offspring of someone with a disease will also have the disease

• If one parent has a disease the other parent will also have the disease

If parents without a trait produce offspring with a trait..

• the trait must be dominant

• the trait must be recessive

• the parents must be homozygous

• the parents cant be carriers

what is a linked gene?

• Genes located close to each other on the same chromosome
• Genes located within the same cell but not on a chromosome
• Genes located on different chromosomes
• Genes located far apart on the same chromosome

do linked genes have independent assortment

• yes

• no

If a cell is going through meiosis, and they have A and B from mom, and a and b from dad (these genes are CLOSE together on the same chromosome), will a gamete with AB or Ab be more commonly produced?

• AB

• Ab

Based on the last question, if 25% of offspring are Ab (recombinants), what is the recombination frequency of those alleles?

• 75%

• 50%

• 25%

• 12.5%