1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
irina1246 [14]
3 years ago
12

genetics book g how do you know that only a single gene is responsible for he color diferences between these snakes?

Biology
1 answer:
mariarad [96]3 years ago
7 0

Answer:

Here is the full question:

An albino corn snake is crossed with a normal colored corn snake. The offspring are all normal-colored. When the first generation progeny snakes are crossed among themselves, they produce 32 normal colored snakes and 10 albino snakes.

a. How do you know that only a single gene is responsible for the color differences between these snakes?

b. which of these phenotypes is controlled by the dominant allele?

c. a normal colored female snake is involved in a test cross. This cross produces 10 normal colored and 11 albina offspring. what are the genotypes of the parents?

Explanation:

First of all, in genetics, Phenotype are the observable physical properties of an organism; these include the organism's appearance, development, and behavior. An organism's phenotype can be determined by its genotype, which is the set of genes the organism carries, as well as by environmental influences on these genes.

Allele, which can also be called allelomorph, is any one of two or more genes that may occur alternatively at a given site on a chromosome. Alleles may occur in pairs, or we may have multiple alleles affecting the phenotype of a particular trait. The combination of alleles that an organism carries is its genotype. If the paired alleles are the same, the organism’s genotype is said to be homozygous for that trait. If they are different, the organism’s genotype is heterozygous. A dominant allele (A) will override the traits of a recessive allele (a) in a heterozygous pairing.

(a) In the question, we have two phenotypes seen in the second generation of this cross: normal and albino. Therefore, only one gene with two alleles is needed to control the phenotypes like colour of the snakes observed. The 3:1 ratio of these phenotypes in the F2 generation will be seen only if a single gene is involved.

(b) The allele controlling the normal phenotype (A) is dominant to the allele controlling the albino phenotype (a).

(c) The male parent’s genotype is aa. The normally colored offspring must receive an A allele from the mother, so the genotype of the normal offspring of the testcross is Aa. The albino offspring must receive an a allele from the mother, so the genotype of the albino offspring of the testcross is aa. Thus, the female parent must be heterozygous Aa.

You might be interested in
1. which of the following list objects in space in order of increasing size.
ladessa [460]
Im pretty sure itwould be b
6 0
3 years ago
Read 2 more answers
Match each form of energy with its definition. The energy of the bonds between atoms.
Licemer1 [7]
Chemical energy, hope this helps. Correct me if im wrong but im sure its chemical energy
7 0
3 years ago
20 PTSSS
WINSTONCH [101]

Ans.

Sex-linked genes are those genes that found on sex-chromosomes (X and Y chromosomes) and their phenotypic expression for a trait depends on the gender of the  offspring.

Most of the sex-linked genes are present on X chromosomes as X chromosomes have more number of genes as they are made up of more DNA as compared to Y chromosome.

However, male individuals are more likely to exhibit the sex-linked traits. It is because most of the sex-linked traits are recessive and males have only one copy of X chromosome, while females have two copies of X chromosome. One mutated copy in male can exhibit the trait, while in females, both of the mutated copies are required to exhibit that trait.

5 0
3 years ago
If you could take all the dna out of your body would it fit on a plate?
ANEK [815]

No unless if you have a plate for kings, if you were to take all your DNA out of your body it would be just under 2 meters long.

4 0
3 years ago
Tropical rain forests have a high degree of biodiversity. How do tropical rain forests contribute to the overall health of the b
galben [10]

it is B hope this helps.

3 0
3 years ago
Other questions:
  • The
    15·1 answer
  • Why is high blood pressure needed
    5·1 answer
  • In the winter, many plants lose their leaves and seem to stop growing. In the spring, these plants make leaf buds and begin to g
    13·2 answers
  • The average annual rainfall for Boston is 43.76 inches. One year, a weather station measured the city’s actual rainfall to be 33
    8·2 answers
  • Buffer zones __________.
    5·1 answer
  • MULTIPLE CHOICE:
    14·1 answer
  • What is the purpose of genetically modified crops?
    13·1 answer
  • What happened to many Maldives islands due to rising sea levels?
    15·1 answer
  • Which of the following is a direct negative consequence of aquaculture?
    14·1 answer
  • With the help of labelled diagram explain the menstrual cycle in adolescent girls​
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!