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3 years ago

1. Look at the illustration in Figure 25-4. Do you think that the bud on the side of the adult hydra

Biology

2 answers:

german3 years ago

7 0

Answer:

A. No, because budding is a type of asexual reproduction.

Explanation:

Asexual reproduction is the process where an organism makes a copy of itself by itself. It does not require a mate to make offspring.

The offspring are genetically identical to the parent.

Budding is a type of asexual reproduction where a small outgrowth of the parent breaks off to become a new organism.

Embryo development is usually only discussed in the context of sexual reproduction, where two gametes fertilize one another and a new organism that is genetically different to either parent is formed.

Bogdan [553]3 years ago

5 0

Answer:

A. No, because budding is a type of asexual reproduction.

Explanation:

The buds on the side of the adult hydra is not an embryo because budding is a type of asexual reproduction.

It is sexual reproduction that produces an embryo from the fusion of gametes.

Hydra produces new ones by budding using part of its body wall.
This process is simply an outgrowth from the body wall.
An embryo is one of the stages of development of offspring originating from a zygote.
It is begins at fertilization to the formation of body structures.
Embryos are peculiar to organisms that reproduces sexually.

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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

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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.

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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).

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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-

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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-

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

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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.

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