A sugarcane plant with yellow pollen and wavy leaves is crossed with a plant with yellow pollen and smooth leaves. Seed are collected and germinated. The following results are obtained in the progeny:
153 yellow pollen, wavy leaves
145 yellow pollen, smooth leaves
48 white pollen, wavy leaves
51 white pollen, smooth leaves
a. For each locus (trait): Assign appropriate symbols for the alleles of the genes, indicate the dominance interaction between the two alleles, and give all possible genotypes and their associated phenotypes
b. Give the genotypes of the parents of this cross.
c. Give the expected genotypic and phenotypic ratios of the progeny of this cross.
Answers
Answer:
a.
i) Y and y represent Yellow and white alleles for the pollen color gene; where Y (yellow) is dominant over y (white).
ii) W and w represent wavy and smooth alleles respectively for the leaf texture gene. W (wavy) is dominant over w (smooth).
YYWW, YyWW, YyWw, YYWw- yellow, wavy phenotype
YYww, Yyww- yellow, smooth phenotype
yyWW, yyWw- white, wavy phenotype
yyww- white, smooth phenotype
b) yellow pollen and wavy leaves (YyWw) × yellow pollen and smooth leaves (Yyww)
c) Expected genotypic and phenotypic ratio of progeny: 3:3:1:1
Explanation:
This question involves two distinct genes; one coding for pollen color and the other for leaf texture. Let Y and y represent Yellow and white alleles respectively for the pollen color gene; where Y (yellow) is dominant over y (white) while W and w represent wavy and smooth alleles respectively for the leaf texture gene; W allele (wavy) is dominant over w allele (smooth).
Next, we convert the progeny number to phenotypic ratio by dividing each number by the smallest number (48)
yellow pollen, wavy leaves= 153/48 =3.18
yellow pollen, smooth leaves= 145/48= 3.02
white pollen, wavy leaves= 48/48= 1
white pollen, smooth leaves= 51/48= 1.06
Approximately, the phenotypic ratio of the progeny is 3:3:1:1
According to the question, a parent with with yellow pollen and wavy leaves will have genotype YyWw because white pollen (w) and smooth leaf (s) was produced in the progeny. Also, the other parent with yellow pollen and smooth leaves will have genotype: Yyww. In a cross between these two parents i.e. YyWw × Yyww, the following gametes will be produced:
YyWw- YW, Yw, yW, yw
Yyww- Yw, Yw, yw, yw
Using these gametes in a punnet square (see attachment), the following 16 offsprings will be produced in a ratio 3:3:1:1
yellow pollen, wavy leaves (Y_W_) 6
yellow pollen, smooth leaves (Y_ww) 6
white pollen, wavy leaves (yyW_) 2
white pollen, smooth leaves (yyww) 2
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Explanation:
I hope this helps:)
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The difference between the qualitative data and quantitative data is the quantitative data is numbers-based, countable, or measurable while qualitative data is interpretation-based, descriptive, and relating to language.
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Thus, option A is correct.
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Your question is incomplete, probably your question was
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(From Topic: 1.3 In studying nature, scientists form and test hypotheses)
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Answer:
A.
Explanation:
osmosis and diffusion are both passive transport bc it doesnt require energy and only moves down cocentration gradient, never against concertration gradient. Give me a brainliest if i helped! ♡
When certain molecules may move by osmosis or diffusion through the membrane without the cell using any energy, the process is called passive transport.
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Answer:
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The complete question is:
An open system is one that receives input from outside the system. For example, your body is an open system because it receives food and oxygen from outside the system (your body). What is another example of an open system?
A. A rock in a field
B. An earthworm taking in soil for nutrition
which statement best explains a way in which a cell gets rid of waste?
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Explanation:
A.They filter waste and extra water from blood so they can create urine, which is removed from the body.
The statement that best explains the way in which a cell gets rid of waste is that the secretory vesicle/ transport vesicle fuses with the plasma membrane and releases its content outside the cell.
What is exocytosis?Exocytosis is the process of secretory vesicles fusing with the plasma membrane, resulting in the extracellular release of vesicle content.
What occurs during exocytosis?It leads to integration of new proteins and lipids into the plasma membrane.Release of the content of secretory vesicle to extracellular medium.To learn more about secretory vesicle, vacuole, exocytosis and transport vesicle here,
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Answers
Answer:
This is because humans are causing species to go extinct at a faster rate than the normal rate.
Explanation:
It is documented that there are at least 2 million species on earth, and species have been naturally evolving and going extinct for billions of years. Some may say even if nothing is done there would still be extinction of this species which is true.
We care if human activity is driving other species extinct as we grow because humans are causing species to go extinct at a faster rate than the normal rate.
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Answer:
1) Plants cells have cell walls; animal cells don’t.
Explanation:
Cell walls function is to help cells stick to each other, which is good for plants since they don’t move around. But as for animal, they need to move around so it’s not good for them to have it.
Without cell walls, animal cells can take on different shapes!
It makes it able to move easier, flexible.
Hope it helped! Please mark brainliest! Thank you! :)
When a true-breeding blue salamander is mated to a true-breeding red salamander, 100%of the offspring are blue. Assuming that salamander skin color is determined by a singlegene, which of the following statements are correct?A. The blue allele is dominant to the red alleleB. The red allele is recessive to the blue alleleC. The blue gene is dominant to the red geneD. The red gene is recessive to the blue geneE. Both A and BF. Both C and D
Answers
Answer:
Both A and B
Explanation:
True breed is a breed that is 100% identical with the parent, the traits inherited from that parents are 100% controlled by same allele of a gene hence they are exact copy.
A single gene can have several alleles, it is the allele that combines together that determines what is seen or expressed.
Allele for blue colour is dominant over allele for red color and that is what led to the phenotypic appearance of the offspring which is blue and the red color is masked. Also, because they are true breeds it means the genotype have the same allele e.g. AA