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When doing a genetic cross why is it necessary to remove the parent flies before the pupae have hatched?
Usually, the parent flies will have a different genotype to the F1 generation (their offspring). For example, if the parents had WW (black eyes) and ww (white eyes), their offspring would all have Ww (black eyes). If you were experimenting further, you would want the F1 generation to cross - with Ww X Ww. If you did not remove the parental generation, you could have crosses between them and the F1 generation, which would result in different genotypes. If the parents were not removed, you could have the following crosses: Ww X WW Ww X ww WW X ww Ww X Ww The only cross that you would desire in the experiment would be F1 X F1 (Ww X Ww), which would give you the desired genotypes for the F2 generation.
In fruit flies straight wings are dominant and curly wings are recessive. What will the generations look like?
If we cross a homozygous dominant fruit fly with straight wings (WW) and a homozygous recessive fruit fly with curly wings (ww), all offspring in the first generation (F1) will be heterozygous (Ww) and exhibit straight wings. If we then cross two F1 flies (Ww x Ww), the second generation (F2) will show a phenotypic ratio of 3 straight-winged flies to 1 curly-winged fly, resulting in about 75% straight wings and 25% curly wings.
What is the genotype of the offspring orange eyes (o) are recessive to black eyes (O) and white skin (w) is recessive to green skin (W).?
To determine the genotype of the offspring with orange eyes and white skin, we note that orange eyes (o) are recessive, meaning the genotype must be homozygous recessive (oo). Similarly, white skin (w) is also recessive, so the genotype for skin color must also be homozygous recessive (ww). Therefore, the genotype of the offspring is oo ww.
When Gregor Mendel crossed true breeding purple flowered plants with true breeding white flowered plants all the offspring were purple because?
PP X ww or Pw X ww Because all Purple flower plants are dominant and express the color purple. This can be seen in a homozygous cross, or a heterozygous cross, ( shown above ) White plants, to breed true, must be in homozygous condition.
What is the result from a cross between the parents Ww and Ww?
The genotypes produced from a cross between Ww and Ww would be: WW Ww Ww ww -The cross between these two genotypes would produce gametes with genotypes in a 1:2:1 ratio.
Suppose you have two mice one black one white the genotype for the black mouse is WW and the genotype for the white mouse is ww What would the punnet square look like?
It would look like this. --¦ W W -------------- w¦ Ww Ww w¦ Ww Ww All the offspring would be black-furred, all carrying one dominant gene and one recessive.
In a certain cat long whiskers (W) are dominant and short whiskers (w) are recessive. Two cats have genotypes Ww and ww. If they have an offspring with short whiskers what is the genotype of their off?
ww
When doing a genetic cross why is it necessary to remove the parent flies before the pupae have hatched?
Usually, the parent flies will have a different genotype to the F1 generation (their offspring). For example, if the parents had WW (black eyes) and ww (white eyes), their offspring would all have Ww (black eyes). If you were experimenting further, you would want the F1 generation to cross - with Ww X Ww. If you did not remove the parental generation, you could have crosses between them and the F1 generation, which would result in different genotypes. If the parents were not removed, you could have the following crosses: Ww X WW Ww X ww WW X ww Ww X Ww The only cross that you would desire in the experiment would be F1 X F1 (Ww X Ww), which would give you the desired genotypes for the F2 generation.
What does a cross of a wavy haired person with a wavy haired person look like on a Punnet square?
When crossing two wavy-haired individuals, represented by the alleles W (wavy) and w (straight), a Punnett square would show the possible genotypes of their offspring. The potential combinations would be WW (wavy), Ww (wavy), and ww (straight). Specifically, the Punnett square would yield a 1:2:1 ratio, with 75% of the offspring expected to have wavy hair (either WW or Ww) and 25% with straight hair (ww).
Describe the offspring of a true breeding white flowering plant?
The offspring of a true breeding white flowering plant will also display white flowers because it carries two copies of the white flower gene. These offspring will be homozygous for the white flower trait and will consistently produce white flowers when they reproduce.
How many of those offspring would you expect to have white?
1000
In fruit flies straight wings are dominant and curly wings are recessive. What will the generations look like?
If we cross a homozygous dominant fruit fly with straight wings (WW) and a homozygous recessive fruit fly with curly wings (ww), all offspring in the first generation (F1) will be heterozygous (Ww) and exhibit straight wings. If we then cross two F1 flies (Ww x Ww), the second generation (F2) will show a phenotypic ratio of 3 straight-winged flies to 1 curly-winged fly, resulting in about 75% straight wings and 25% curly wings.
Why did the orchestra get an r rating?
Too Much Sax and Violins
What is the genotype of the offspring orange eyes (o) are recessive to black eyes (O) and white skin (w) is recessive to green skin (W).?
To determine the genotype of the offspring with orange eyes and white skin, we note that orange eyes (o) are recessive, meaning the genotype must be homozygous recessive (oo). Similarly, white skin (w) is also recessive, so the genotype for skin color must also be homozygous recessive (ww). Therefore, the genotype of the offspring is oo ww.
What colors will the offspring of a black cat carrying a white allele and a purebred white cat be?
There is no such thing as a "purebred" white cat. White and black are just colours, not breeds. For a start, there are two genes that can make a cat white: The usual being dominant and therefore cannot be carried by a black cat, and the recessive albino. My guess is we are only talking about the recessive allele, so we have a black cat carrying albino (Cc) and a pure albino (cc). In this case half the kittens would be white (cc) and half would be black (Cc). Forgetting the albino gene, the black cat would not be carrying white at all (ww), the pure white cat would be dominant (WW), and all the offspring would be white (Ww). In life I would say the purewhite cat is most likely dominant and if the black cat carries the albino allele or not it makes no difference; all offspring would be white.
Do all animals need to mate to have offspring?
No, not all animals need to mate to have offspring.
WHAT IS THE POSSIBLE GAMATE OF WW?
WW
