Question

Use a Punnett square to determine the genotypic and phenotypic ratios below.
Phenotypic
Ratios
Genotypic
Ratios
Cross
Trait
Key
Punnett Square
% RR
% Red
%
% White
14. RRXIT
Red flowers are
incomplete
dominant over
white flowers
RR red flowers
Rr-pink flowers
white flowers
% Rr
9 Pink
15. HHX Hh
Curly hair is
incomplete
dominant to
straight hair
HH = curly har
#hawary hain
hh =>+Night hai
16. BW x BW
Black fur is
codominant with
white fur
BW: Black fur
Bw=gray fur
16w = White fur
Label the scenarios below as either Complete Dominance, Co-dominance or Incomplete Dominance.
17
18.
19.
A flower Is heterozygous for RED petal color
A flower Is heterozygous for PINK petal color
List the genotype:
List the phenotype:
List the genotype:
List the phenotype
A flower is heterozygous for RED and WHITE
petal colors
List the genotype:
List the phenotype:

Answer 1

Answer:

Explanation

Your Punnett square contains one YY, two Yy and one yy, so your genotypic ratio is 1 : 2 : 1. If Y is dominant and y is recessive, there are only two phenotypes because YY and Yy have the same phenotype, so your phenotypic ratio is 3 : 1 (the two Yys plus the one YY make 3 of that phenotype)

Answer 2

Based onnthe data provided, the genotypic and phenotypic ratio of the offspring are as follows:

• Phenotypic ratio: Red = 0%, Pink = 100%, White = 0%
• Genotypic ratio: RR = 0%, rr = 0%, Rr = 100%
• Phenotypic ratio: Curly hair = 50%, Wavy hair = 50%, Straight hair = 0%
• Genotypic ratio: HH = 50%, hh = 0%, Hh = 50%
• Phenotypic ratio: Black fur = 25%, Gray fur = 50%, White fur= 25%
• Genotypic ratio: BB = 25%, BW = 50%, WW = 25%

What is genotype and phenotype?

Genotype of an organism is the sum total of the genetic makeup of the organism.

Phenotype refers to the physical expression of the genotype of the organism as result of tye interact between the genes and the environment.

From the given cross, the genotypic and phenotypic ratio of offspring are as follows:

RR × rr = Rr, Rr, Rr, Rr

Phenotypic ratio: Red = 0%, Pink = 100%, White = 0%

Genotypic ratio: RR = 0%, rr = 0%, Rr = 100%

HH × Hh = HH, HH, Hh, Hh

Phenotypic ratio: Curly hair = 50%, Wavy hair = 50%, Straight hair = 0%

Genotypic ratio: HH = 50%, hh = 0%, Hh = 50%

BW × BW = BB, BW, BW, WW

Phenotypic ratio: Black fur = 25%, Gray fur = 50%, White fur= 25%

Genotypic ratio: BB = 25%, BW = 50%, WW = 25%

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