What is the atmosphere ?

A female fly that has miniature wings and sepia eyes is crossed with a male that has normal wings and is homozygous for red eyes

Eduardwww [97]

Answer and Explanation:

The gene that expresses the size of the wing is X-linked. The dominant allele expresses long wings, XM, while the recessive allele expresses miniature wings, Xm.

The gene that expresses the color of the eyes is autosomal. The dominant allele expresses red color, S, and the recessive allele expresses sepia color, s.

A female fly that has miniature wings and sepia eyes (XmXm ss) is crossed with a male that has normal wings and is homozygous for red eyes (XMY SS).

The F1 are intercrossed to produce the F2.

1º Cross:

Parental) XmXm ss x XMY SS

Gametes) Xms Xms Xms Xms

XMS XMS YS YS

Punnet Square) Xms Xms Xms Xms

XMS XMXmSs XMXmSs XMXmSs XMXmSs

YS XmY Ss XmY Ss XmY Ss XmY Ss

F1) 1/2 or 50% of the progeny are females and the other 1/2 or 50% are males

100% of the females (1/2 or 50% of the progeny) are long-winged and red-eyed

100% of the males (1/2 or 50% of the progeny) are miniature.winged and red-eyed.

2º Cross:

Parental) XMXm Ss x XmY Ss

Gametes) XMS XMs XmS Xms

XmS Xms YS Ys

Punnet Square) XMS XMs XmS Xms

XmS XMXm SS XMXm Ss XmXm SS XmXm Ss

Xms XMXm Ss XMXm ss XmXm Ss XmXm ss

YS XMY SS XMY Ss XmY SS XmY Ss

Ys XMY Ss XMY ss XmY Ss XmY ss

F2) 8/16=4/8=1/2 or 50% of the progeny are females and the other 1/2 or 50% are males

Females (8/16):

3/8 of the females are long-winged and red-eyed, XMX- S-

1/8 of the females are long-winged and sepia-eyed, XMX- ss

3/8 of the females are miniature-winged and red-eyed, XmXm S-

1/8 of the females are miniature-winged and sepia-eyed, XmXm ss

Males (8/16):

3/8 of the males are long-winged and red-eyed, XMY S-

1/8 of the males are long-winged and sepia-eyed, XMY ss

3/8 of the males are miniature-winged and red-eyed, XmY S-

1/8 of the males are miniature-winged and sepia-eyed, XmY ss

Note: The symbol "-" means that in its place might be a recessive allele or a dominant allele. For example, S- means that it might be SS or Ss.

4 0

2 years ago

Which of the following are characteristics of sexual reproduction (select all that apply)

weeeeeb [17]

Answer:D,E,F

Explanation:

5 0

3 years ago

Most bacteria growth best within certain range of condition. By manipulating _______________________, ____________________, ____

VashaNatasha [74]

Answer:

Most bacteria growth best within certain range of condition. By manipulating temperature and time, air, the proper amount of water acid and salt, you can eliminate, control, or reduce the rate at which bacteria grow.

Explanation:

Like all living things, bacteria need food, water and the proper environment to live and grow. The food product itself supplies the food and water needed for bacterial growth.he exact environmental requirements can vary from one type of bacteria to another. Most bacteria grow best within certain ranges of temperature, and have specific requirements related to their need for air, the proper amount of water, acid and salt. By controlling nutrients, water, temperature and time, air, acidity, and salt, you can eliminate, control, or reduce the rate at which bacteria grow.

Bacterias need following optimum conditions to grow

1. Food (nutrients)

2. Water (moisture)

3. Proper temperature

4. Time

5. Air, no air, minimal air

6. Proper acidity (pH)

7. Salt levels

By altering anyone of them we can restrict or reduce the rate at which the bacteria grow.

5 0

2 years ago

Food establishments may only serve food from a source that is

bezimeni [28]

A food establishment is an operation that stores, prepares, packages, serves, vends, delivers or otherwise produces food for human consumption. Food that is offered in food establishments should come from local-approved food sources. They can use produce that they grow themselves or from agricultural producers that should be licensed and are responsible to assure that their produce is safe (complying applicable laws). The producer has to have a United States Department of Agriculture inspected plant. Food establishments should obtain produce from those who have been certified in Good Agricultural Practices and Good Handling Practices.

4 0

2 years ago

In humans, one form of polydactyly (extra fingers and toes) is controlled by a single autosomal gene with two possible alleles;

Dmitry [639]

25% chance / 0.25 chance the second baby will be born with this polydactyl. If we make the allele for polydactyl p, we know both the parents have this allele as Pp because the first child was able to get pp. So if you do a punnette square, the 3 possible options are PP (25% chance) Pp (50% chance) and pp (25% chance).

5 0

3 years ago