genetics

Question 1

what is codominance

Answer 1

RR’ two dominant alleles who are both expressed in heterozygotes which gives a mix of both colors (spots)
RR RR’ R’R’

Question 2

what are X-linked Traits

Answer 2

genes only on the X chromosome therefore, man are more likely to “suffer” form x-linked diseases since they only have one X and one affected = sick. Woman = 2 man and for the sickness to show both X must be affected (less likely)

Question 3

What is epistasis?

Answer 3

when they are two genes in different loci. Ex: if there is hair or not; what pigment is the color.

Question 4

Lethality

Answer 4

recessive lethal when you have this gene: the offspring will not survive
Dominant: only transmitted one generation: very rare

Question 5

y-linked example

Answer 5

infertility

Question 6

incomplete dominance:

Answer 6

offspring mix of parents

Question 7

true-breeding

Answer 7

parents with same phenotype give a child with same phenotype as well

Question 8

latent vs expressed unit factor

Answer 8

expressed = the one that is seen (dominent)
latent = not seen (recessive)

Question 9

monohybrid cross

Answer 9

two homozygous parents

Question 10

test cross

Answer 10

Y? crossed with yy to see if Y? is heterozygous or homosygous

Question 11

trait

Answer 11

characteristic

Question 12

allele

Answer 12

alternative versions of a gene

Question 13

when placing alleles

Answer 13

same locus on homologues chromosomes; but sister chromatids are the same if Aa on of the chromosomes will have both sister chromatids AA the other aa