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
zalisa [80]
2 years ago
7

En el hombre el color negro de los ojos “A” domina sobre el color azul “a” Una pareja en la que el hombre tiene los ojos negros

y la mujer ojos azules tienen dos hijos, uno de ellos de ojos negros y el otro de ojos azules. Averiguar:
a) El genotipo del padre.
b) Realizar el cruzamiento.
c) Porcentaje genotípico de los hijos.
Biology
1 answer:
umka21 [38]2 years ago
7 0

Las respuestas a estas preguntas son:

a) Genotipo del padre Aa (ojos negros)

b) Cruzamiento: Aa (padre) x aa (madre)

c) Frecuencias genotípicas esperadas: 1/2 Aa; 1/2 aa  

En genética, dominancia completa se refiere al proceso  de herencia en la cual un individuo heterocigota, es decir, el individuo que presenta dos alelos diferentes para el mismo gen, presenta el mismo fenotipo que un individuo homo-cigota para el alelo dominante (el alelo dominante es aquel que enmascara la expresión del alelo recesivo en individuos heterocigotas).

En este caso, el carácter 'color de ojos' presenta un patrón de herencia monogénica, donde el alelo 'A' dominante codifica para el rasgo fenotípico ojos negros, mientras que el alelo 'a' recesivo codifica para el rasgo fenotípico ojos azules.  

En el ejemplo, la pareja tuvo progenie en la cual uno de los hijos presenta el rasgo recesivo ojos claros, con lo cual el padre debe ser heterocigota y poseer un alelo recesivo 'a'; mientras que la madre expresa el fenotipo recesivo y por lo tanto su genotipo es 'aa'. En consecuencia, el cruzamiento de un padre heterozigota 'Aa' con una madre homo-cigota recesivo 'aa' producirá una descendencia con una frecuencia genotípica esperada de 1/2 (50%) de hijos con ojos 'color negro' de genotipo Aa y 1/2 (50%) de hijos con ojos 'color celelste' de genotipo aa >>

Cruzamiento: Aa (padre) x aa (madre)

Gametos padre: 1/2 A; 1/2 a

Gametos madre: 100% a

Cuadro de Punett (combinaciones gaméticas):

                  A           a

a               Aa          aa

a               Aa          aa

En consecuencia,  este cruzamiento producirá 50% individuos ojos color negro (genotipo Aa) y 50% individuos con ojos color celelste (genotipo aa)

Podés encontrar más información sobre este tema en:

brainly.com/question/22398195?referrer=searchResults

You might be interested in
Which statement best describes an effect of the low density of frozen water in a lake?
Rus_ich [418]
C. <span>When water in a lake freezes, it floats, providing insulation for organisms below.

This </span> best describes an effect of the low density of frozen water in a lake.
5 0
3 years ago
Read 2 more answers
Which systems work together to deliver oxygen to the cells of the body?
Rzqust [24]
Respiratory system and the cardiovascular system
3 0
3 years ago
Read 2 more answers
Role of Lipids and Carbohydrates - Type Lipid or Carbohydrate behind each question. 16. Provide long term energy storage. 17. Pr
zhuklara [117]

Answer:

16. Carbohydrates  

17. Lipids

18. Carbohydrates

19. Carbohydrates

20. Lipids

21. Lipids

22. Carbohydrates

23. Lipids

Explanation:

Carbohydrates are organic molecules composed of carbon, hydrogen and oxygen. Carbohydrates can be classified into three types: monosaccharides (e.g. glucose), disaccharides (e.g., lactose), and polysaccharides (e.g., starch). Cellulose is a carbohydrate where many glucose rings chain together, while chitin is a polysaccharide consisting of chains of modified glucose molecules.

Lipids represent a diverse group of organic molecules that include, among others, fats, waxes, oils, hormones, etc. Lipids play a role by insulating (and protecting) the body. For example, there is a layer of fats beneath the skin which enables to maintain body temperature relatively constant. In animals, lipids constitute about 50% of the mass of cell membranes. These membrane lipids are mainly phospholipids, glycolipids and cholesterol. There are hormones that derive from lipids such as steroid hormones, which derive from cholesterol. Some examples of steroid hormones are testosterone, estrogen and cortisol.

4 0
3 years ago
Is it true that all cells have the same genes, but different genes are active in different cells?
Sav [38]

Answer:

Is it true that all cells have the same genes, but different genes are active in different cells.

No, all cells are made up of a gene which is inherited from the parents cell. The gene is located in the DNA which is found in the nucleus of every living cell

Explanation:

7 0
3 years ago
How many different codons can code for the amino acid tryptophan (Trp)?
Rom4ik [11]
Tryptophan is specified by one single codon, which is what makes it so unique since it’s the only amnio acid that has one codon.
4 0
3 years ago
Other questions:
  • A female with unattached earlobes and a widow's peak hairline, and a male with attached earlobes and a widow's peak hairline hav
    10·1 answer
  • How can the mass of a glass of orange juice be increased? By evaporating the orange juice. By freezing the orange juice. By boil
    14·1 answer
  • If a chemical that interrupts cell division is added to a culture liver tissue,which process would stop?
    5·1 answer
  • What can get cancer and what must it have in order to get cancer?
    7·1 answer
  • All stars are born with the same basic composition, yet stars can differ greatly in appearance. which two basic factors are most
    8·1 answer
  • A true breeding line of green pod pea plants is crossed with a true-breeding line of yellow pod plants. All of their offspring h
    13·1 answer
  • 2. Gas exchange occurs in the bark through light and dark disruptions called:
    12·2 answers
  • Distinguish between ionic bonds, covalent bonds and hydrogen bonds
    9·1 answer
  • Digestion in echinoderms​
    10·1 answer
  • What part of the body does tuberculosis mainly affect?
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!