42%(24)42% found this document useful (24 votes) 25K views4 pagesMendelian Genetics Key
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Directions: In your groups of 2, complete the worksheet below. Each question should be answered by a
{i. you should not answer multiple questions in a row). Initial by the questions you complete.
Names:
1. Amale and female bird have 4 unhatched eggs. The female
is on the left heterozygous; the male on the right is homozygous
recessive. Use B or b for your genotypes.
a. Write the genotype of the female (left) below:
Bb
b. Write the genotype of the male (right) below:
bb
. Which color is dominant, gray or black? How do you know?
: Ba nay
He Aomnodk addy
d. Write the phenotype of the female and the phenotype of the male below:
oO fonda qrmy Ma Wa
e. Complete the Punnett Square below for this couple: }y b
8
b [ob [bb _|
f. If they follow the Punnett Square ratios, what will the babies in the eggs look like when they hatch?
= gto O& Bock
g. Willall four offspring adhere exactly to the ratios predicted by the Punnett Square? Explain:
thy, tk i i will,
0 Puoockl square is tly a predickien
‘int: if fp @ coln ond get heads 5 times in a row, what isthe litelihood that | will get heads onthe next fp?
0
ep bagi wi iit igen ado Grom 2. A amily of fish resides in a tank. The instructor, while bored
decides to determine the genotypes of the
parents based on their back fins.
‘a. What is the dominant phenotype?
ins
‘What is the recessive phenotype?
| bn
c. What are the two possible genotypes LP
each adult fish? ap
re
4. How many baby fish have the dominant phenotype? How many have the recessive phenotype?
6 hove Pe domrinort persry pe
O howe Ye recessive jerde
omplete both Punnett Squares below, one each for all possible genotypes of the upper adult fish.
rcle the Punnett Square above that is correct for the fish shown here.
@. What are the genotypes of the parents?
poke
fh. Why are the other Punnett Squares not possible for this family? (assume that the offspring exactly
{follow the predicted ratios)
Late der squares ik is nde aasible duce
A Bin Rearing. s
oO
[CoPprmnicnT Chai Kown, WareRsOKO WI 2013. AVAABLEFOR PUBLIC USE PROVIDED THE AUTHOR 5 TED. Ge Sciences 0 3. Two yetis have babies.
‘a. What is the dominant phenotype?
No herns
b. What is the recessive phenotype?
Horns
©. What is the genotype of the yeti parent on the left?
hh
d. What are the two possible genotypes of the yeti parent on the right?
MW © Wh
@. What are the phenotypes of the yeti babies?
No_horns
Complete both Punnett
ft
g. Circle the Punnett Square above that is correct for the yetis shown here.
h. What are the genotypes of the parents?
HY od Wr
predicted ratios)
‘Corio Cea Kom, WaTenrORD WI 2014. AVALABLEFOR PUB USE PROVIDED HE AUTHOR I CTE.
quares below, one each for both possible genotypes of the right adult yeti
Why can't the parents have a different genotype? (assume that the offspring exactly follow the
gricultural Sciences 4. Back fins are dominant on this species of salamander. Could this couple have had this baby? Explain. oO
5. Inthe space below, draw a mother and father with four offspring (any kind of animal — you choose). Create two
‘tats for them (color, horns, wings, fins, etc.). Create a dominant and recessive phenotype for each trait. Then
describe the genotype of each individual and describe their inheritance patterns (e.g. “the mother was
homozygous dominant and the father was homozygous recessive, so all babies are heterozygous for this trait)
Finally complete a Punnett Square for each trait and label what trait each square represents,
Corman nase Koun, WarenFon® WI 2011. AVAIABLEFOR PUBUC USE PROMDED THE AUTHORS CED. Agricultural Scie
ie
