L4

Question 1

what is located in a locus

Answer 1

a gene

Question 2

What is the chromosome theory of inheritance

Answer 2

The fusion of genetics and cytology; 1902 Sutton and Boveri independently proposed the chromosome theory of inheritance; the behavior of Mendel’s genes during the production of gametes parallels that of chromosomes at meiosis

Question 3

what is the ration of independent assortment

Answer 3

9:3:3:1

Question 4

Who discovered linkage of genes

Answer 4

1900s Bateson and Punnett were studing the inheritance of two genes in sweet peas , did not show 9:3:3:1 ratio

Question 5

What is the purpose of a testcross and what is it

Answer 5

A testcross involves crossing a heterozygous individual with a homozygous recessive

Question 6

what is the ratio of a test cross progeny

Answer 6

1:1:1:1 (Mendelian ratio)

Question 7

what does it mean when the number of recombinants are smaller than the number of parental types

Answer 7

means the closer the chromosomes are from each other; possible linkage

Question 8

what does it mean when eg. the number of parental types has a high resulting number

Answer 8

means the much more likely this combination will occur in the progeny

Question 9

What is a cis allelic configuration

Answer 9

means that when both dominant alleles are on the same chromosome in F1

Question 10

what results from crossing over of non sister chromatids

Answer 10

new combinations of chromosomes; variation

Question 11

what is a trans allelic configuration

Answer 11

when one dominant and one recessive allele are on each chromosone in F1

Question 12

Who’s work figured out cis and trans allelic configurations

Answer 12

Morgan