pedigrees and unit 6

Question 1

autosomal dominant

Answer 1

two parents have a 50% chance of having an affected child because they only need one copy of the gene from either parent because the trait is dominant

only one parent must be a carrier of the trait to have a child with an autosomal dominant trait

Question 2

autosomal recessive

Answer 2

two unaffected parents have an affected child because the trait is recessive in Dd x Dd cross there is a 25% chance of having dd and that child would have the recessive trait

both parents must be carriers to cause the trait if it is autosomal recessive

Question 3

linked genes

Answer 3

genes on the same chromosome that are located close together so they tend to be inherited together during reproduction

less likely to be separated by recombination

Question 4

r

recombination

Answer 4

a genetic process that exchanges genetic information between chromosomes happens in meiosis prophase 1, resulting in new gene combinations and creating genetic variation r

Question 5

recombinant

Answer 5

an organism affected by the process of recombination that have a genetic variation

Question 6

How to find % percent of recombinants

Answer 6

amount of recombinants / total number of offspring = % of recombinants

Question 7

how to determine from a pedrigree if it is an x linked recessive trait

Answer 7

if mom has trait and all sons have the trait its x linked recessive

Question 8

how to determine from a pedigree if it is an x linked dominant trait

Answer 8

if the dad and all daughters have the trait it is x linked dominant

Question 9

sex linked genes

Answer 9

genes located on the sex chromosomes ( X or Y)

Question 10

x linked dominant trait

Answer 10

only one parent has to be a carrier for the trait to show up in offspring

Question 11

x linked recessive

Answer 11

both parents have to carry the x linked recessive trait for it to show up in childern

Question 12

non nuclear inheritance

Answer 12

transmission of genetic material that occurs outside the nucleus primarily through mitochondria in humans and chloroplasts in plants. Traits inhertied thru non nuclear inheritance are only from the mother so if the mom has the trait and all her kids than its non nuclear inheritance