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
Leno4ka [110]
2 years ago
11

Two parents are heterozygous for a gene that has a simple dominant-recessive pattern of inheritance. If they

Biology
1 answer:
Black_prince [1.1K]2 years ago
4 0

Answer: one offspring out of the four will have a recessive-recessive genotype.

Explanation: A cross between two parents who are heterozygous for a gene that has a simple dominant-recessive pattern of inheritance will produce four offsprings: one will be homozygous dominant, two will be heterozygous dominant while one will be homozygous recessive.

Homozygous dominant offspring has two dominant alleles, heterozygous dominant offspring has one dominant allele and one recessive allele while a homozygous recessive offspring has two recessive alleles.

For example, a cross between two parents that are heterozygous (Tt) for tall will produce one TT, two Tt and one tt. TT is homozygous dominant, Tt is heterozygous dominant and tt is homozygous recessive. An offspring with genotype tt has a two recessive alleles thus have a recessive-recessive genotype. Therefore the number of offsprings with recessive-recessive genotype is one.

See the attached punnet square for more information

You might be interested in
True or False: Skeletal muscles are found in the heart
Zigmanuir [339]
True they are in the heart as well as the rest of your body
6 0
3 years ago
Duchenne muscular dystrophy is a serious condition caused by a recessive allele of a gene on the human X chromosome. The patient
klio [65]

Answer:

One-half of the daughters of an affected man would have this condition.

Explanation:

Each daughter born to a woman that is positive for a dystrophin mutation on one of her two X chromosomes possess a 50 percent likelihood of possessing the mutation and also becoming a carrier. Carriers at times do not show the disease symptoms but may give birth to a child that has the mutation or the disease condition. DMD carriers do have a higher chance of cardiomyopathy.

A man with DMD cannot transfer the affected gene to his sons since he passes to his son a Y chromosome, not the X chromosome. But he will definately transfer it to his daughters, since each daughter possess her father’s only X chromosome resulting in the daughters being carriers.

Hence, One-half of the daughters of an affected father and a carrier mother could have this condition.

3 0
2 years ago
Which geological process directly forms beaches on the shore of a bay?
Andrew [12]

Answer:

erosion, transportation, and deposition.

Explanation:

i took the topic and i remembered. please like and rate my answer. brainleast please?

3 0
3 years ago
Why do cells in the epidermis flatten out and die as they reach the surface of the skin?
Rudik [331]
May not be right, but because of Oxygen and the growing of new skin? We rub our skin without noticing and it will become frail and rub off, creating new skin
8 0
3 years ago
In humans, brown eyes are dominant over blue eyes. Suppose a blue-eyed woman has children with a brown-eyed man whose mother was
Agata [3.3K]

Answer:

There is a 50% chance their child will have blue eyes.

4 0
2 years ago
Other questions:
  • explain how Copernicus concluded that stars were farther away than planets. draw a diagram showing this principle to another exa
    5·1 answer
  • What type of tissue comprises the bulk of the myocardium
    13·1 answer
  • What would happen to a bacterial cell if its protective covering was destroyed?
    11·1 answer
  • A ________ is any environmental agent—biological, chemical, or physical—that causes damage. a contaminant b mutagen c teratogen
    10·2 answers
  • Someone help mee pls :)
    7·1 answer
  • Fill in the blank. An (blank) solution occurs when the solute concentration outside of the cell is higher than
    7·1 answer
  • Mosses and other bryophytes are quite short, while many ferns, cone-bearing plants, and flowering plants can grow quite tall. Wh
    15·1 answer
  • Lipid (fat) breakdown begins in the<br> a. stomach<br> b. ileum<br> c. jejunum<br> d. duodenum
    9·2 answers
  • What causes large amounts of air to move?
    10·1 answer
  • In one or two sentences, explain how a disease that harms the roots of a flowering plant would affect the plant's ability to sur
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!