Mendelian genetics 2

Question 1

important to do practice of the crosses before exams

Answer 1

-

Question 2

dihybrid cross example

SsYy and SsYy

Answer 2

....SY Sy SY sy
SY
Sy
sY
sy

Question 3

mendel’s law of independent assortment

Answer 3

1. during meiosis different pairs of alleles segregate independently of each other

Question 4

why independent assortment not as universal as law of segregation
???

Answer 4

1. some genes linked (on same chromosome)

2. but chromosomes assort independently during meiosis

Question 5

mendels law of segregation

Answer 5

1. during gamete formation (meiosis) alleles for each gene segregate from each other
2. so each gamete carries one allele per gene

Question 6

mendels law of independent assortment

Answer 6

1. genes for different features segregate independently during gamete formation
2. true only for genes on different chromosomes or those far enough apart on the same chromosome to be separated by recombination in meiosis

Question 7

law of dominance

Answer 7

dominant alleles mask recessive allele

Question 8

mendels 3 laws

Answer 8

1. law of segregation
2. law of independent assortment
   3 law of dominance

Question 9

monohybrid crosses

Answer 9

1. predict possible combination of gametes during fertilisation
2. visual representation of mendels inheritance
3. looking at one gene

Question 10

dihybrid crosses

phenotypic ratio

Answer 10

9:3:3:1