20. If a plant that is homozygous dominant for purple flower color (PP) is mated
ID: 220447 • Letter: 2
Question
20. If a plant that is homozygous dominant for purple flower color (PP) is mated to a plant that is homozygous recessive for pink flower color (pp), their offspring will display a 3:1 ratio of purple to pink flowers. 21. Two heterozygotes (MmZz x MmZz) were mated and the resulting phenotypic ratio was 9:3:3:1, then M and Z genes are linked genes. express dwarfism but a male with one d allele does express dwarfism, this trait must be autosomal with a man who had normal vision, there is a 50% chance that their child could be color-blind. development. 22. If the allele that causes dwarfism (d) is recessive and a female with one d allele for this trait does not 23. If a woman who was a carrier for the recessive color-blindness allele (X-linked trait) had a child 24. Individuals with Klinefelter syndrome have an extra Y chromosomes and display normal male 25. Fish have two genes that control scale color. One gene controls color of the scale (B-black, b- gray) and the other controls whether or not color pigment is deposited in the scales (P-pigment deposited, p-pigment not deposited white). Correct this statement If a fish that is heterozygous for both traits mates with a fish that is recessive for both traits, their offspring have a 1/16 chance of being white.Explanation / Answer
(20) if a plant that is homozygous dominant for purple flower color (PP) is mated to a plant that is homozygous recessive for pink flower color (pp), their offspring will all be pink flowers.
(21)
Two heterozygotes (MmZz x MmZz) were mated and the resulting phenotypes ratio was 9:3:3:1, then M and Z genes are not linked.
(22)if the allele that causes dwarfism is recessive and a female with one d allele for this trait does not express dwarfism but a male with one d allele express dwarfism, this trait must be x linked.
(23)if a woman wo was a carrier for the recessive color blindness allele (x linked) had a child with a man who had normal vision, there is a 25% chance that their child could be color blind
XXc x XY = XX, XY, XcX, XcY (¼ will be color blind)
(24) individuals with klinefelter's syndrome have an extra X chromosomes and display abnormal development.
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