Let’s start by assigning letters for our alleles for the two traits: *****These are the letters...

Let’s start by assigning letters for our alleles for the two traits: *****These are the letters that I assigned*****

Colony color: Red: RR Cream: rr

.Tryptophan Dependence: Growth: TT No Growth: tt

Now, let’s do our first parental cross of the yeast dihybrid, homozygous parents! Fill in the Punnett Square where the grey is the area to list the gametes generated from each parent (P1) and the white boxes are the F1 offspring

***first row and colum are grey*****

---------->grey	R	R	T	T
r	Rr	Rr	Tr	Tr
r	Rr	Rr	Tr	Tr
t	Rt	Rt	Tt	Tt
t	Rt	Rt	Tt	Tt

Now, let’s do the F1 x F1 dihybrid cross so we can understand which gametes are going into this cross and we can make some predictions about phenotypes!

	R	r	T	r
R	RR	Rr	RT	Rr
t	Rt	rt	Tt	tr
T	RT	Tr	TT	Tr
t	Rt	rt	Tt	rt

****Please help, are these correct??? If so what would be the phneotypes and genotypes for both parent and f1generation? Explanation would be appreciated as well****

Solutions

Expert Solution

The correct answers are as follows

TTRR (Red, growth) x rrtt (cream, no growth)----P1

TR rt ---------------------------Gametes

TtRr (Red, growth)------------------F1

F1 x F1

TtRr x TtRr

	TR	Tr	tR	tr
TR	TTRR (red, growth)	TTRr (red, growth)	TtRR (red, growth)	TtRr (red, growth)
Tr	TTRr (red, growth)	TTrr(cream, growth)	TtRr (red, growth)	Ttrr(cream, growth)
tR	TtRR (red, growth)	TtRr (red, growth)	ttRR (red, no growth)	ttRr (red, no growth)
tr	TtRr (red, growth)	Ttrr(cream, growth)	ttRr (red, no growth)	ttrr (cream, no growth)

F2 phenotypic ratio:

Red, growth : Red, no growth : Cream, growth : Cream, no growth = 9:3:3:1

gladiator answered 1 year ago

Next > < Previous

Related Solutions

Three linked traits in garden pea plants are each controlled by two alleles. Yellow pods are...

Three linked traits in garden pea plants are each controlled by two alleles. Yellow pods are recessive to green pods, bluish green seedlings are recessive to green seedlings, and creeper is recessive to normal. A plant heterozygous for all three traits was crossed to a creeper plant with yellow pods and bluish green seedlings. The following F2 results were obtained: 171 green pods, bluish green seedlings, creeper 307 yellow pods, green seedlings, creeper 13 green pods, green seedlings, normal 2067...

What gives rise to different variations of traits within a species? a. Different alleles of a...

What gives rise to different variations of traits within a species? a. Different alleles of a gene b. Varying distances between genes c. Natural selection D. None of the above 2.) Crossing true breeding dark-coated sheep with true breeding light-coated sheep always results in 100% dark-coated offspring. You are screening a population of 300 Soay sheep for coat color, and you count 224 dark sheep and 76 light sheep. What is the genotype frequency of the homozygous recessive sheep for...

Suppose that a “word” is any string of six letters. Repeated letters are allowed. For our...

Suppose that a “word” is any string of six letters. Repeated letters are allowed. For our purposes, vowels are the letters a, e, i, o, and u. a) How many words are there? b) How many words begin with a vowel? c) How many words begin with a vowel and end with a vowel? d) How many words have no vowels? e) How many words have exactly one vowel? A professor teaching a Discrete Math course gives a multiple choice...

Locus A has two alleles (A and a) while locus B has two alleles (B and...

Locus A has two alleles (A and a) while locus B has two alleles (B and b). The recombination frequency between locus A and locus B is 11%. A F1 heterozygote in trans configuration is mated with an aabb individual. What are the expected phenotypic percentages in the resulting progeny? Report your percentages to the tenths place and in the following format, replacing the "0.0" with your percentages.

In tomatoes, pear shape, yellow color, and terminal flower position are recessive traits produced by alleles...

In tomatoes, pear shape, yellow color, and terminal flower position are recessive traits produced by alleles f, r, and t, respectively. The dominant phenotypes for each trait – full shape, red color, and axial flower position- are the product of dominant alleles F, R, and T. A farmer has two pure breeding tomato lines. One is full, yellow, terminal, and the other is pear, red, and axial. Design a breeding experiment (a series of crosses) that will produce a line...

Conditional alleles are commonly used by geneticists to control when (temporal) and where (spatial) specific traits...

Conditional alleles are commonly used by geneticists to control when (temporal) and where (spatial) specific traits are expressed. In this question, you should outline a strategy utilizing the genetic tools that we have discussed during class. It might be simpler to draw a diagram of the engineered loci. Include all the components that are required for the experiment to be successful. (Tools: Cre-Lox and FLP-FRT recombination, forgot to previously list the tools) A) What strategy could you use to switch...

Let’s say you are going to hedge a portfolio and you remember the Greek Letters. What...

Let’s say you are going to hedge a portfolio and you remember the Greek Letters. What do you need to think about when you establish a hedge ratio? Hint: when might you need a “dynamic” hedging strategy versus “a hedge and hold” and how does that relate to the different inputs into Black-Scholes model.

Let’s say that a population has N individuals (2N alleles) in generation t. It suddenly undergoes...

Let’s say that a population has N individuals (2N alleles) in generation t. It suddenly undergoes a population expansion such that the t+1 generation has 100N individuals (i.e.200N alleles). How does this change the effective population size? What does this mean for the amount of drift in this new population?

Gene P has two alleles - P and p; gene Q has two alleles - Q...

Gene P has two alleles - P and p; gene Q has two alleles - Q and q. If an PQ/pq female is crossed with a pq/pq male, what percent of the offspring would have genotype pq/pq if... A) the genes were completely linked (no crossing-over at all; recombination frequency = 0; 1 mark) B) the genes are 10 map units apart (1 mark) C) the genes are 24 map units apart (1 mark) For either part (B) or (C)...

Gene A has two alleles, A1 and A2. Gene B has two alleles, B1 and B2....

Gene A has two alleles, A1 and A2. Gene B has two alleles, B1 and B2. In a population, the following haplotypes are observed. A1B1 = 0.2, A2B2 = 0.45, A1B2 = 0.15, and A2B1 = 0.2. Calculate the extent of linkage disequilibrium, D.

Subjects